An air-conditioner for a vehicle comprising: an air conditioning case having an air intake port (6, 7) on a first side and a plurality of air outlets on a second side, air passing through the plurality of air outlets toward a passenger compartment, the plurality of air outlets (20-23, 30-33, 91-93) being opened to correspond to a plurality of seats including a predetermined seat, which is a driver seat or a front seat, and an other seat, the air conditioning case having an air passage between the air intake port and the plurality of air outlets, blow-off air passing through the air passage; an air conditioning blower sending air to the air passage of the air conditioning case; an air conditioning part (41, 42) which heats or cools to air-condition the air sent from the air conditioning blower and sends conditioned-air to the plurality of air outlets; an opening-and-closing part which changes opening-and-closing state of the plurality of air outlets between an allowed state and an intercepted state, conditioned-air being allowed to pass an air outlet of the plurality of air outlets which air-conditions the other seat except the predetermined seat in the allowed state and being intercepted in the intercepted state, conditioned-air being allowed to pass an air outlet of the plurality of air outlets which air-conditions the predetermined seat in the intercepted state and the allowed state; and a control part which conducts an air conditioning for the passenger compartment by controlling the air conditioning blower, the air conditioning part and the opening-and-closing part, wherein the air conditioner is characterized in that the control part controls the opening-and-closing part into the intercepted state as a control of a predetermined seat state, when a predetermined seat air conditioning command is provided to air-condition the predetermined seat, when a stop command which requires to stop the air conditioning blower is provided in the predetermined seat state, the control part controls the air conditioning blower to stop sending air, wherein after the air conditioning blower is stopped, the control part controls the opening-and-closing part to open at least one air outlet of the plurality of air outlets which air-conditions the other seat in a manner that a total open area of the air outlets becomes larger than or equal to a total open area of the air outlets in the predetermined seat state. an air conditioning case having an air intake port (6, 7) on a first side and a plurality of air outlets on a second side, air passing through the plurality of air outlets toward a passenger compartment, the plurality of air outlets (20-23, 30-33, 91-93) being opened to correspond to a plurality of seats including a predetermined seat, which is a driver seat or a front seat, and an other seat, the air conditioning case having an air passage between the air intake port and the plurality of air outlets, blow-off air passing through the air passage; an air conditioning blower sending air to the air passage of the air conditioning case; an air conditioning part (41, 42) which heats or cools to air-condition the air sent from the air conditioning blower and sends conditioned-air to the plurality of air outlets; an opening-and-closing part which changes opening-and-closing state of the plurality of air outlets between an allowed state and an intercepted state, conditioned-air being allowed to pass an air outlet of the plurality of air outlets which air-conditions the other seat except the predetermined seat in the allowed state and being intercepted in the intercepted state, conditioned-air being allowed to pass an air outlet of the plurality of air outlets which air-conditions the predetermined seat in the intercepted state and the allowed state; and a control part which conducts an air conditioning for the passenger compartment by controlling the air conditioning blower, the air conditioning part and the opening-and-closing part, wherein the air conditioner is characterized in that the control part controls the opening-and-closing part into the intercepted state as a control of a predetermined seat state, when a predetermined seat air conditioning command is provided to air-condition the predetermined seat, when a stop command which requires to stop the air conditioning blower is provided in the predetermined seat state, the control part controls the air conditioning blower to stop sending air, wherein after the air conditioning blower is stopped, the control part controls the opening-and-closing part to open at least one air outlet of the plurality of air outlets which air-conditions the other seat in a manner that a total open area of the air outlets becomes larger than or equal to a total open area of the air outlets in the predetermined seat state.