An inkjet printer for recording an image on a recording medium by ejecting ink from a recording head while intermittently conveying the recording medium, the inkjet printer comprising: a recording head for ejecting ink onto a recording medium from a plurality of nozzles; conveyance means for conveying the recording medium; a carriage having the recording head mounted therein, the carriage being reciprocable in a direction intersecting with a conveyance direction of the recording medium; a platen for retaining the recording medium, the platen being arranged so as to be opposed to a surface of the recording head, on which the plurality of nozzles are arranged; a heater provided in the platen, for heating the recording medium; a housing having at least the platen and the carriage built therein; housing-suction means for sucking a gas from an outside into an inside of the housing, the housing-suction means being arranged at a position opposed to a rear surface of the carriage on an upstream side in the conveyance direction; ducts respectively provided on an upper part of the carriage on a forward side in a moving direction thereof and an upper part of the carriage on a rearward side in the moving direction thereof, the ducts being arranged so as to project toward the housing-suction means; carriage-suction means for sucking the gas, which is sucked by the housing-suction means, into the carriage, the carriage-suction means being arranged on a distal end of a projecting part of each of the ducts at a position opposed to the housing-suction means; and an exhaust port having an elongated hole shape, the exhaust port being formed along the moving direction in a lower part of a front surface of the carriage on a downstream side in the conveyance direction, wherein the housing-suction means has a height in a vertical direction, which is larger than a height of the carriage-suction means in the vertical direction, wherein the gas sucked by the housing-suction means is separated into the gas to be caused to flow through an inside of the carriage by the carriage-suction means, and into the gas to be caused to flow through an outside of the carriage, wherein the each of the ducts comprises a bending portion for causing the gas, which is sucked by the carriage-suction means, to flow in an inward direction of the carriage, wherein the gas flowing through the inside of the carriage cools the inside of the carriage, wherein the gas flowing through the inside of the carriage is discharged from the exhaust port, and wherein the discharged gas is discharged to an outside of the housing while being mixed with the gas flowing through the outside of the carriage. a recording head for ejecting ink onto a recording medium from a plurality of nozzles; conveyance means for conveying the recording medium; a carriage having the recording head mounted therein, the carriage being reciprocable in a direction intersecting with a conveyance direction of the recording medium; a platen for retaining the recording medium, the platen being arranged so as to be opposed to a surface of the recording head, on which the plurality of nozzles are arranged; a heater provided in the platen, for heating the recording medium; a housing having at least the platen and the carriage built therein; housing-suction means for sucking a gas from an outside into an inside of the housing, the housing-suction means being arranged at a position opposed to a rear surface of the carriage on an upstream side in the conveyance direction; ducts respectively provided on an upper part of the carriage on a forward side in a moving direction thereof and an upper part of the carriage on a rearward side in the moving direction thereof, the ducts being arranged so as to project toward the housing-suction means; carriage-suction means for sucking the gas, which is sucked by the housing-suction means, into the carriage, the carriage-suction means being arranged on a distal end of a projecting part of each of the ducts at a position opposed to the housing-suction means; and an exhaust port having an elongated hole shape, the exhaust port being formed along the moving direction in a lower part of a front surface of the carriage on a downstream side in the conveyance direction, wherein the housing-suction means has a height in a vertical direction, which is larger than a height of the carriage-suction means in the vertical direction, wherein the gas sucked by the housing-suction means is separated into the gas to be caused to flow through an inside of the carriage by the carriage-suction means, and into the gas to be caused to flow through an outside of the carriage, wherein the each of the ducts comprises a bending portion for causing the gas, which is sucked by the carriage-suction means, to flow in an inward direction of the carriage, wherein the gas flowing through the inside of the carriage cools the inside of the carriage, wherein the gas flowing through the inside of the carriage is discharged from the exhaust port, and wherein the discharged gas is discharged to an outside of the housing while being mixed with the gas flowing through the outside of the carriage.