diff --git a/client.go b/client.go
index e591000..01f77d0 100644
--- a/client.go
+++ b/client.go
@@ -198,8 +198,9 @@ type Container struct {
 }
 
 type ObjectStorageUsage struct {
-	containers []Container
-	quota      float64
+	containers  []Container
+	quota       float64
+	total_usage float64
 }
 
 // オブジェクトストレージの使用容量を取得
@@ -221,9 +222,15 @@ func (cc *ConohaClient) ObjectStorageUsage() (*ObjectStorageUsage, error) {
 		return nil, err
 	}
 
+	total_usage, err := strconv.ParseFloat(headers.Get("X-Account-Bytes-Used"), 64)
+	if err != nil {
+		return nil, err
+	}
+
 	return &ObjectStorageUsage{
-		containers: uResp,
-		quota:      quota,
+		containers:  uResp,
+		quota:       quota,
+		total_usage: total_usage,
 	}, nil
 }
 
diff --git a/exporter.go b/exporter.go
index 9f41042..f339e2d 100644
--- a/exporter.go
+++ b/exporter.go
@@ -32,6 +32,7 @@ func NewConohaCollector(client *ConohaClient) (*ConohaCollector, error) {
 			// 4番目のnilには、固定ラベルをprometheus.Labelsで渡せる
 			prometheus.NewDesc("object_storage_requests", "Requests to Object Storage", []string{"method"}, nil),
 			prometheus.NewDesc("object_storage_quota", "Object Storage Quota", []string{}, nil),
+			prometheus.NewDesc("object_storage_total_usage", "Total Object Storage Usage", []string{}, nil),
 			prometheus.NewDesc("object_storage_usage", "Usage of Object Storage", []string{"container"}, nil),
 			prometheus.NewDesc("object_storage_count", "Object Counts of Object Storage", []string{"container"}, nil),
 			prometheus.NewDesc("database_usage", "Usage of Database (GB)", []string{"database"}, nil),
@@ -62,10 +63,11 @@ func (cc *ConohaCollector) AutoUpdate() {
 			log.Fatal(err)
 		}
 		metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[1], prometheus.GaugeValue, usage.quota))
+		metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[2], prometheus.GaugeValue, usage.total_usage))
 
 		for _, container := range usage.containers {
-			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[2], prometheus.GaugeValue, float64(container.Bytes), container.Name))
-			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[3], prometheus.GaugeValue, float64(container.Count), container.Name))
+			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[3], prometheus.GaugeValue, float64(container.Bytes), container.Name))
+			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[4], prometheus.GaugeValue, float64(container.Count), container.Name))
 		}
 
 		serviceIDs := make(map[string]bool)
@@ -76,7 +78,7 @@ func (cc *ConohaCollector) AutoUpdate() {
 			if err != nil {
 				log.Fatal(err)
 			}
-			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[4], prometheus.GaugeValue, info.DbSize, db.DbName))
+			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[5], prometheus.GaugeValue, info.DbSize, db.DbName))
 
 			serviceIDs[db.ServiceID] = true
 		}
@@ -87,8 +89,8 @@ func (cc *ConohaCollector) AutoUpdate() {
 			if err != nil {
 				log.Fatal(err)
 			}
-			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[5], prometheus.GaugeValue, float64(quota.Quota), serviceID))
-			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[6], prometheus.GaugeValue, float64(quota.TotalUsage), serviceID))
+			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[6], prometheus.GaugeValue, float64(quota.Quota), serviceID))
+			metrics = append(metrics, prometheus.MustNewConstMetric(cc.describes[7], prometheus.GaugeValue, float64(quota.TotalUsage), serviceID))
 		}
 
 		// メトリクスデータ更新