diff --git a/core/api.go b/core/api.go
index b59e6de..7f3959d 100644
--- a/core/api.go
+++ b/core/api.go
@@ -379,6 +379,11 @@ func (caller apiCaller) couponAPI(w http.ResponseWriter, r *http.Request) error
 			logger.Println("begin listAllCouponNames")
 			listAllCouponNames(caller.mg.mongoClient, w, r)
 		}
+
+	case "DELETE":
+		// 쿠폰 삭제
+		logger.Println("begin deleteCoupon")
+		deleteCoupon(caller.mg.mongoClient, w, r)
 	}
 	return nil
 }
diff --git a/core/api_coupon.go b/core/api_coupon.go
index 8e788f6..46e690d 100644
--- a/core/api_coupon.go
+++ b/core/api_coupon.go
@@ -30,6 +30,7 @@ type couponDoc struct {
 	Total   int64    `json:"total" bson:"total"`
 	Remains []string `json:"remains,omitempty" bson:"remains,omitempty"`
 	Used    []string `json:"used,omitempty" bson:"used,omitempty"`
+	Expire  int64    `json:"expire" bson:"expire"`
 }
 
 func makeCouponKey(roundnum uint32, uid []byte) string {
@@ -72,6 +73,7 @@ func generateCoupons(mongoClient gocommon.MongoClient, w http.ResponseWriter, r
 	effect, _ := gocommon.ReadStringFormValue(r.Form, "effect")
 	count, _ := gocommon.ReadIntegerFormValue(r.Form, "count")
 	desc, _ := gocommon.ReadStringFormValue(r.Form, "desc")
+	expire, _ := gocommon.ReadIntegerFormValue(r.Form, "expire")
 
 	if count == 0 {
 		logger.Println("[generateCoupons] count == 0")
@@ -92,6 +94,7 @@ func generateCoupons(mongoClient gocommon.MongoClient, w http.ResponseWriter, r
 				Effect: effect,
 				Desc:   desc,
 				Total:  -1,
+				Expire: expire,
 			},
 		}, options.Update().SetUpsert(true)); err != nil {
 			logger.Println("[generateCoupons] Update failed :", err)
@@ -154,6 +157,7 @@ func generateCoupons(mongoClient gocommon.MongoClient, w http.ResponseWriter, r
 				Effect: effect,
 				Desc:   desc,
 				Total:  count,
+				Expire: expire,
 			},
 		}, options.Update().SetUpsert(true))
 	}
@@ -231,7 +235,7 @@ func queryCoupon(mongoClient gocommon.MongoClient, w http.ResponseWriter, r *htt
 	var coupon couponDoc
 	if err := mongoClient.FindOneAs(CollectionCoupon, bson.M{
 		"_id": roundObj,
-	}, &coupon, options.FindOne().SetProjection(bson.M{"effect": 1, "name": 1, "reason": 1, "total": 1, "desc": 1}).SetReturnKey(false)); err != nil {
+	}, &coupon, options.FindOne().SetProjection(bson.M{"effect": 1, "name": 1, "reason": 1, "total": 1, "desc": 1, "expire": 1}).SetReturnKey(false)); err != nil {
 		logger.Println("[queryCoupon] FindOneAs failed :", err)
 		w.WriteHeader(http.StatusInternalServerError)
 		return
@@ -275,30 +279,13 @@ func useCoupon(mongoClient gocommon.MongoClient, w http.ResponseWriter, r *http.
 		round, _ = coupon.MakeCouponRoundHash(code)
 	}
 
-	// 1. 내가 이 라운드의 쿠폰을 쓴 적이 있나
-	already, err := mongoClient.Exists(CollectionCouponUse, bson.M{
-		"_id":    acc,
-		"rounds": round,
-	})
-	if err != nil {
-		logger.Println(err)
-		w.WriteHeader(http.StatusInternalServerError)
-		return
-	}
-
-	if already {
-		// 이미 이 라운드의 쿠폰을 사용한 적이 있다.
-		w.WriteHeader(http.StatusConflict)
-		return
-	}
-
 	var coupon couponDoc
 	roundObj, _ := primitive.ObjectIDFromHex(round + round + round)
 	if len(key) == 0 {
 		// 무한 쿠폰일 수 있으므로 존재하는지 확인
 		if err := mongoClient.FindOneAs(CollectionCoupon, bson.M{
 			"_id": roundObj,
-		}, &coupon, options.FindOne().SetProjection(bson.M{"_id": 0, "effect": 1, "name": 1, "reason": 1, "total": 1})); err != nil {
+		}, &coupon, options.FindOne().SetProjection(bson.M{"_id": 0, "effect": 1, "name": 1, "reason": 1, "total": 1, "expire": 1})); err != nil {
 			logger.Println(err)
 			w.WriteHeader(http.StatusInternalServerError)
 			return
@@ -310,7 +297,7 @@ func useCoupon(mongoClient gocommon.MongoClient, w http.ResponseWriter, r *http.
 			return
 		}
 	} else {
-		// 2. 쿠폰을 하나 꺼냄
+		// 쿠폰을 하나 꺼냄
 		matched, _, err := mongoClient.Update(CollectionCoupon, bson.M{
 			"_id": roundObj,
 		}, bson.M{
@@ -328,7 +315,7 @@ func useCoupon(mongoClient gocommon.MongoClient, w http.ResponseWriter, r *http.
 			return
 		}
 
-		// 3. round의 효과 읽기
+		// round의 효과 읽기
 		if err := mongoClient.FindOneAndUpdateAs(CollectionCoupon, bson.M{
 			"_id": roundObj,
 		}, bson.M{
@@ -340,6 +327,47 @@ func useCoupon(mongoClient gocommon.MongoClient, w http.ResponseWriter, r *http.
 		}
 	}
 
+	if coupon.Expire > time.Now().Unix() {
+		// 쿠폰 만료시간 경과
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	alreadyused := false
+
+	// 무한 쿠폰인지 일회용 쿠폰인지 구분
+	// 쿠폰 사용 유무 검사
+	if coupon.Total == -1 {
+		already, err := mongoClient.Exists(CollectionCouponUse, bson.M{
+			"_id":    acc,
+			"rounds": round,
+		})
+		if err != nil {
+			logger.Println(err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+
+		alreadyused = already
+	} else {
+		already, err := mongoClient.Exists(CollectionCouponUse, bson.M{
+			"rounds": round,
+		})
+		if err != nil {
+			logger.Println(err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+
+		alreadyused = already
+	}
+
+	if alreadyused {
+		// 이미 이 라운드의 쿠폰을 사용한 적이 있다.
+		w.WriteHeader(http.StatusConflict)
+		return
+	}
+
 	if len(coupon.Effect) == 0 {
 		// 쿠폰이 없네?
 		w.WriteHeader(http.StatusBadRequest)
@@ -370,3 +398,22 @@ func useCoupon(mongoClient gocommon.MongoClient, w http.ResponseWriter, r *http.
 
 	w.Write([]byte(coupon.Effect))
 }
+
+func deleteCoupon(mongoClient gocommon.MongoClient, w http.ResponseWriter, r *http.Request) {
+	code, _ := gocommon.ReadStringFormValue(r.Form, "name")
+	if len(code) == 0 {
+		logger.Println("coupon delete code error")
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	_, err := mongoClient.Delete(CollectionCoupon, bson.M{
+		"name": code,
+	})
+
+	if err != nil {
+		logger.Println("coupon delete error")
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+}