diff --git a/router/middleware.go b/router/middleware.go
index 5ac6fef..21f5e27 100644
--- a/router/middleware.go
+++ b/router/middleware.go
@@ -1,8 +1,12 @@
 package router
 
 import (
+	"bytes"
+	"encoding/json"
 	"errors"
+	"io/ioutil"
 	"net/http"
+	"strconv"
 
 	"github.com/labstack/echo"
 
@@ -36,17 +40,39 @@ func MiddlewareAdmin(next echo.HandlerFunc) echo.HandlerFunc {
 	}
 }
 
-// MiddlewareItemSocial ItemがPersonalItemでない場合はAdmin以外を弾くmiddleware
-func MiddlewareItemSocial(getItem func(c echo.Context) model.Item) func(next echo.HandlerFunc) echo.HandlerFunc {
-	return func(next echo.HandlerFunc) echo.HandlerFunc {
-		return func(c echo.Context) error {
-			item := getItem(c)
-			user := c.Get("user").(model.User)
-			if item.Type != model.PersonalItem && !user.Admin {
-				return c.NoContent(http.StatusForbidden)
-			}
+// MiddlewareBodyItemSocial リクエストボディから取得したItemがPersonalItemでない場合はAdmin以外を弾くmiddleware
+func MiddlewareBodyItemSocial(next echo.HandlerFunc) echo.HandlerFunc {
+	return func(c echo.Context) error {
+		body, err := ioutil.ReadAll(c.Request().Body)
+		if err != nil {
+			return next(c)
+		}
+		c.Request().Body = ioutil.NopCloser(bytes.NewBuffer(body))
+		item := model.Item{}
+		if err = json.Unmarshal(body, &item); err != nil {
+			return next(c)
+		}
+		user := c.Get("user").(model.User)
+		if item.Type != model.PersonalItem && !user.Admin {
+			return c.NoContent(http.StatusForbidden)
+		}
+		return next(c)
+	}
+}
+
+// MiddlewareParamItemSocial パラメータから取得したItemがPersonalItemでない場合はAdmin以外を弾くmiddleware
+func MiddlewareParamItemSocial(next echo.HandlerFunc) echo.HandlerFunc {
+	return func(c echo.Context) error {
+		itemID, err := strconv.Atoi(c.Param("id"))
+		if err != nil {
 			return next(c)
 		}
+		item, _ := model.GetItemByID(uint(itemID))
+		user := c.Get("user").(model.User)
+		if item.Type != model.PersonalItem && !user.Admin {
+			return c.NoContent(http.StatusForbidden)
+		}
+		return next(c)
 	}
 }
 
diff --git a/router/router.go b/router/router.go
index 071c689..c6cb375 100644
--- a/router/router.go
+++ b/router/router.go
@@ -1,14 +1,9 @@
 package router
 
 import (
-	"bytes"
-	"encoding/json"
-	"io/ioutil"
 	"net/http"
-	"strconv"
 
 	"github.com/labstack/echo/middleware"
-	"github.com/traPtitech/booQ/model"
 
 	"github.com/labstack/echo"
 )
@@ -31,37 +26,12 @@ func SetupRouting(e *echo.Echo, client *UserProvider) {
 		apiItems := api.Group("/items")
 		{
 			apiItems.GET("", GetItems)
-			apiItems.POST("", PostItems, MiddlewareItemSocial(func(c echo.Context) model.Item {
-				item := model.Item{}
-				body, err := ioutil.ReadAll(c.Request().Body)
-				if err != nil {
-					return model.Item{}
-				}
-				c.Request().Body = ioutil.NopCloser(bytes.NewBuffer(body))
-				if err = json.Unmarshal(body, &item); err != nil {
-					return model.Item{}
-				}
-				return item
-			}))
+			apiItems.POST("", PostItems, MiddlewareBodyItemSocial)
 			apiItems.GET("/:id", GetItem)
 			apiItems.PUT("/:id", PutItem)
 			apiItems.DELETE("/:id", DeleteItem, MiddlewareAdmin)
-			apiItems.POST("/:id/owners", PostOwners, MiddlewareItemSocial(func(c echo.Context) model.Item {
-				itemID, err := strconv.Atoi(c.Param("id"))
-				if err != nil {
-					return model.Item{}
-				}
-				item, _ := model.GetItemByID(uint(itemID))
-				return item
-			}))
-			apiItems.PUT("/:id/owners", PutOwners, MiddlewareItemSocial(func(c echo.Context) model.Item {
-				itemID, err := strconv.Atoi(c.Param("id"))
-				if err != nil {
-					return model.Item{}
-				}
-				item, _ := model.GetItemByID(uint(itemID))
-				return item
-			}))
+			apiItems.POST("/:id/owners", PostOwners, MiddlewareParamItemSocial)
+			apiItems.PUT("/:id/owners", PutOwners, MiddlewareParamItemSocial)
 			apiItems.POST("/:id/logs", PostLogs)
 			apiItems.POST("/:id/comments", PostComments)
 			apiItems.POST("/:id/likes", PostLikes)