Drive transmission apparatus and image forming apparatus

An image forming apparatus comprising:

• an image forming unit configured to form an image on a recording medium;
• a drive source;
• a rotating member configured to rotate by receiving a drive transmitted from the drive source, and configured to transport the recording medium;
• a structure that is attachable to and detachable from an image forming apparatus body and houses at least a portion of a transmission mechanism configured to transmit the drive transmitted from the drive source to the rotating member;
• a support member that has a first surface and a second surface, and supports the structure;
• and
• a coupling member that is fixed to the support member by using a first fixing tool, is fixed to the structure by using a second fixing tool, and couples the structure with the support member,
• wherein the coupling member includes:
• a first attachment portion to which the first fixing tool is attachable from a side of the first surface of the support member;
• and
• a second attachment portion to which the second fixing tool is attachable from a side of the second surface of the support member, and
• wherein the structure includes a fall preventing portion configured to prevent the second fixing tool detached from the second attachment portion from falling.