A pet bag,Including a bag bodyA bag of cloth and an adjustment of structure,The body has a first opening and a second opening which are respectively communicated with the interior of the knapsack body,The pet can be placed inside the bag body and the head can be extended from the first opening,The adjusting structure is arranged on the bag body along the first opening,To adjust the aperture size of the first opening,To prevent the pet from passing through the first opening;The bag cloth is combined with the bag body,A bag like space is formed between the bag body and the bag body,The pocket space is communicated with the second opening;So,The bag user can extend his hand into the bag like space between the bag cloth and the bag body,And touching the pet through the second opening,Reduce pet restlessness.一種寵物背袋,包括有一背袋本體、一袋布以及一調整結構,該本體具有一第一開口與一第二開口分別與背袋本體內部相通,寵物可安置於該背袋本體內部並將頭部自該第一開口伸出,該調整結構係沿著該第一開口處而設置於該背袋本體上,用以調整該第一開口的口徑大小,以避免寵物穿出該第一開口;該袋布結合於該背袋本體,且與該背袋本體之間形成一袋狀空間,該袋狀空間與該第二開口連通;藉此,背袋使用者可將手伸入該袋布與該背袋本體之間的該袋狀空間,並通過該第二開口而觸摸寵物,降低寵物之不安情緒。