To provide an infant garment easy to attach and detach a pants part when changing a diaper, and having a simple structure and a low production cost.

This infant garment 10 has an upper garment 11 including a front part 13 and a back part 14, and a pants part 12 which is connected to the upper garment 11 and has a belly part 15, a waist part 16 and a pair of leg parts 17a and 17b. The front part 13 of the upper garment 11 and the belly part 15 of the pants part 12 are unitedly connected. On the other hand, the back part 14 of the upper garment 11 and the waist part 16 of the pants part 12 are not connected to form an opening part 20 for changing a diaper. It is possible to easily change a diaper 30 of an infant B from the opening part 20 for changing a diaper.