Drive transmission apparatus and image forming apparatus

A drive transmission apparatus comprising:

• a shaft member disposed on a first axis;
• an engage member supported by the shaft member and configured to rotate;
• an engaged member configured to rotate centering on a second axis in parallel with the first axis and to be engaged with and disengaged from the engage member by relatively moving with respect to the engage member along an axial direction of the first axis;
• an intermediate member interposed between the shaft member and the engage member and configured to permit the engage member to rotate centering on the second axis in an engaged condition in which the engage member is engaged with the engaged member;
• and
• a moving portion configured to abut against and move the engage member in a movement direction such that a rotational axis of the engage member approaches the second axis in terms of a radial direction with respect to the second axis in a case in which the engage member and the engaged member approach each other in a disengaged condition in which the engage member is disengaged from the engaged member, the movement direction being a direction different from the axial direction of the first axis.