Unit type air conditioner including a base plate forming a bottom part thereof, a barrier projected upward from a center part of the base plate, to divides the unit type air conditioner into an indoor part for mounting an indoor heat exchanger thereon and an outdoor part for mounting an outdoor heat exchanger thereon, a shroud for leading air drawn from an outdoor to the outdoor heat exchanger, the shroud dividing an inside of the outdoor part, exterior members including a cabinet surrounding opposite side parts and rear side part of he outdoor part, and a cover on the cabinet to form an upper exterior of the outdoor part, and a brace fastened to the barrier, the shroud, and the exterior members, for preventing relative positional change between the barrier, the shroud, and the external members, thereby fastening components rigidly, to enhance fastening strength.