To provide an abdominal muscle exercise bench-seat to which an assisting slant pad can be attached detachably so that a load on a user will be greatly reduced in taking the abdominal muscle exercise because the user is supported by the slant pad from the hip to the back of the head and can start the exercise with the user's body slanting, and so that even a woman or the old with weak abdominal muscles can take abdominal muscle exercise easily with sufficient assistance.

A slant pad 18 is detachably attached to the bench-seat 19 of this abdominal muscle exercise bench-seat. The slant pad 18 consists of a cushion part and a cushion fixing part 9, and the backrest surface of the slant pad is from 80 cm to 100 cm in length. The bench-seat 19 consists of a flat board and a bench-seat fixing part 10. By fixing the slant pad 18 on the upper surface of the rear 12 of the bench-seat, even a woman or the old with weak abdominal muscles can take the abdominal muscle exercise easily with sufficient assistance. In addition, the whole structure of the abdominal muscle exercise bench-seat is simple and it is relatively inexpensive.