In a monolithic air conditioner, a front panel is mounted on a front of a cabinet and includes an indoor air intake, an indoor air outlet, and a discharge guide backwardly extended from the indoor air outlet. An indoor heat exchanger is mounted on a back of the front panel. An air guide on which the indoor heat exchanger is mounted includes an orifice in a center to pass sucked indoor air therethrough. A scroll is mounted on a back of the air guide to guide the sucked indoor air. An indoor fan is mounted between the scroll and the air guide to suck the indoor air. A shroud is mounted on a back of the scroll to guide sucked outdoor air and it defines an orifice in a center to discharge the sucked outdoor air. An outdoor fan is mounted on a back of the shroud to suck the outdoor air, a fan motor is mounted on the scroll to drive the indoor and outdoor fans, and an outdoor heat exchanger is mounted on a back of the outdoor fan to exchange heat with the sucked outdoor air.