An inflatable pet house module includes first and second inflatable units. The first inflatable unit includes an inflatable mattress and a mattress cover formed with an opening for insertion of the mattress thereinto. The second inflatable unit is coupled releasably to the first inflatable unit by a coupling unit, and includes an inflatable canopy body and a canopy cover formed with an opening for insertion of the canopy body thereinto. The canopy body has a middle portion provided with a middle heat-seal line unit to partition the canopy body into two canopy sections. The canopy body is bendable along the middle heat-seal line unit when inflated so as to place the canopy body in a standing position where the middle portion is propped up by the canopy sections to thereby enable the first and second inflatable units to cooperatively define a chamber.