A bicycle operating device comprises a base member, a cable control body, an operating member, a supporting structure, and an adjusting structure. The cable control body is configured to be pivotably mounted to the base member about a pivot axis to control a control cable. The operating member is configured to be movably mounted to the base member from a rest position to an operated position to move the cable control body. The supporting structure is configured to pivotably support the cable control body relative to the base member. The supporting structure is provided to the base member so as to at least partly intersect with the pivot axis. The adjusting structure is configured to adjustably position the supporting structure relative to the base member such that the rest position of the operating member is adjusted relative to the base member.