One-piece dress

The utility model discloses a one-piece dress which comprises an upper body and a skirt body. The upper body and the skirt body are sewed to be one body. Shoulders on an upper portion of the upper body are provided with fixed sheets. A decorative chain is disposed on each fixed sheet. The decorative chains are movably connected with the fixed sheets. The skirt body is provided with a pleat layer which comprises an upper rim, a bottom rim, a left rim and a right rim. The upper rim is sewed on a stitched position between the upper body and the skirt body. The bottom rim, the left rim and the right rim are all of movable structures. The characteristics are that the one-piece dress is reasonable in design and beautiful in appearance, and is comfortable to wear.