An upper body of a garment includes a body having at least a rear body, a left sleeve, and a right sleeve. The left sleeve includes a left connecting portion connected to a left side of the body. The right sleeve includes a right connecting portion connected to a right side of the body. Each rear surface of the left connecting portion and the right connecting portion has a recess protruding to the inside of the left or right sleeve. A length of the recess in a longitudinal direction of the left or right sleeve is longer than a width of the recess in a circumferential direction of the left or right sleeve.