A pedaling exercise machine according to the present embodiment includes: a pair of right and left pedal portions on which feet of a user are placed; a rotation mechanism that rotates the pedal portions when the feet of the user step on the pedal portions; a seating portion that is disposed on a rear end side of the rotation mechanism separately from the rotation mechanism and on which the user is seated; a fixing member disposed on a front end side of the rotation mechanism; and a belt member that is detachably connected to the seating portion and provided to extend from the fixing member to the seating portion.