An image forming apparatus comprising: an apparatus body; a carriage movable in a main scanning direction; a first recording head (4b, 4c, 4d) mounted on the carriage, the first recording head (4b, 4c, 4d) having nozzles in a nozzle face thereof to eject liquid droplets; a second recording head mounted on the carriage, the second recording head having nozzles in a nozzle face thereof to eject liquid droplets, the second recording head displaced from the first recording head (4b, 4c, 4d) in a sub scanning direction perpendicular to the main scanning direction and parallel to a nozzle arrange direction; and a maintenance assembly to maintain and recover the first recording head (4b, 4c, 4d) and the second recording head, the maintenance assembly characterized by: a first maintenance device fixed to the apparatus body, the first maintenance device including a moisture-retention cap disposed in the first maintenance device to seal the nozzle face of the first recording head (4b, 4c, 4d); and a second maintenance device including a suction cap to seal the nozzle face of the first recording head (4b, 4c, 4d) and the nozzle face of the second recording head, the suction cap connected to a sucking device to suck the liquid from the nozzles of the first recording head (4b, 4c, 4d) and the nozzles of the second recording head, wherein the second maintenance device is reciprocally movable in the sub scanning direction between a first position to oppose the first recording head (4b, 4c, 4d) and a second position to oppose the second recording head; and the suction cap of the second maintenance device sucks the liquid from the nozzles of the first recording head (4b, 4c, 4d) at the first position and sucks the liquid from the nozzles of the second recording head at the second position. an apparatus body; a carriage movable in a main scanning direction; a first recording head (4b, 4c, 4d) mounted on the carriage, the first recording head (4b, 4c, 4d) having nozzles in a nozzle face thereof to eject liquid droplets; a second recording head mounted on the carriage, the second recording head having nozzles in a nozzle face thereof to eject liquid droplets, the second recording head displaced from the first recording head (4b, 4c, 4d) in a sub scanning direction perpendicular to the main scanning direction and parallel to a nozzle arrange direction; and a maintenance assembly to maintain and recover the first recording head (4b, 4c, 4d) and the second recording head, the maintenance assembly characterized by: a first maintenance device fixed to the apparatus body, the first maintenance device including a moisture-retention cap disposed in the first maintenance device to seal the nozzle face of the first recording head (4b, 4c, 4d); and a second maintenance device including a suction cap to seal the nozzle face of the first recording head (4b, 4c, 4d) and the nozzle face of the second recording head, the suction cap connected to a sucking device to suck the liquid from the nozzles of the first recording head (4b, 4c, 4d) and the nozzles of the second recording head, wherein the second maintenance device is reciprocally movable in the sub scanning direction between a first position to oppose the first recording head (4b, 4c, 4d) and a second position to oppose the second recording head; and the suction cap of the second maintenance device sucks the liquid from the nozzles of the first recording head (4b, 4c, 4d) at the first position and sucks the liquid from the nozzles of the second recording head at the second position. a first maintenance device fixed to the apparatus body, the first maintenance device including a moisture-retention cap disposed in the first maintenance device to seal the nozzle face of the first recording head (4b, 4c, 4d); and a second maintenance device including a suction cap to seal the nozzle face of the first recording head (4b, 4c, 4d) and the nozzle face of the second recording head, the suction cap connected to a sucking device to suck the liquid from the nozzles of the first recording head (4b, 4c, 4d) and the nozzles of the second recording head, wherein the second maintenance device is reciprocally movable in the sub scanning direction between a first position to oppose the first recording head (4b, 4c, 4d) and a second position to oppose the second recording head; and the suction cap of the second maintenance device sucks the liquid from the nozzles of the first recording head (4b, 4c, 4d) at the first position and sucks the liquid from the nozzles of the second recording head at the second position.