A railway vehicle comprising: an air-conditioner configured to generate conditioned air to be supplied to a passenger compartment of the railway vehicle; and a heat generating device provided adjacent to the air-conditioner and including a heat generating section, the air-conditioner and the heat generating device being provided under a floor in a longitudinal direction of the railway vehicle, wherein the air-conditioner changes a flow direction of outdoor air suctioned from any of a width direction, an upper side, and a lower side of the railway vehicle to eject the outdoor air in the longitudinal direction of the railway vehicle, and cools the heat generating device, characterised in that: the air-conditioner includes, in the longitudinal direction of the railway vehicle, an outdoor blower chamber in which an outdoor blower for ventilating an outdoor heat exchanger is installed and which is provided at a position adjacent to the heat generating device, and an outdoor unit chamber that abuts on the outdoor blower chamber and includes the outdoor heat exchanger, and in a process of guiding a flow direction of outdoor air, which is suctioned to the outdoor unit chamber and flows in the width direction or a vertical direction of the railway vehicle, to the outdoor blower chamber, the flow direction is changed into a direction along the longitudinal direction of the railway vehicle. an air-conditioner configured to generate conditioned air to be supplied to a passenger compartment of the railway vehicle; and a heat generating device provided adjacent to the air-conditioner and including a heat generating section, the air-conditioner and the heat generating device being provided under a floor in a longitudinal direction of the railway vehicle, wherein the air-conditioner changes a flow direction of outdoor air suctioned from any of a width direction, an upper side, and a lower side of the railway vehicle to eject the outdoor air in the longitudinal direction of the railway vehicle, and cools the heat generating device, characterised in that: the air-conditioner includes, in the longitudinal direction of the railway vehicle, an outdoor blower chamber in which an outdoor blower for ventilating an outdoor heat exchanger is installed and which is provided at a position adjacent to the heat generating device, and an outdoor unit chamber that abuts on the outdoor blower chamber and includes the outdoor heat exchanger, and in a process of guiding a flow direction of outdoor air, which is suctioned to the outdoor unit chamber and flows in the width direction or a vertical direction of the railway vehicle, to the outdoor blower chamber, the flow direction is changed into a direction along the longitudinal direction of the railway vehicle. the air-conditioner includes, in the longitudinal direction of the railway vehicle, an outdoor blower chamber in which an outdoor blower for ventilating an outdoor heat exchanger is installed and which is provided at a position adjacent to the heat generating device, and an outdoor unit chamber that abuts on the outdoor blower chamber and includes the outdoor heat exchanger, and an outdoor blower chamber in which an outdoor blower for ventilating an outdoor heat exchanger is installed and which is provided at a position adjacent to the heat generating device, and an outdoor unit chamber that abuts on the outdoor blower chamber and includes the outdoor heat exchanger, and in a process of guiding a flow direction of outdoor air, which is suctioned to the outdoor unit chamber and flows in the width direction or a vertical direction of the railway vehicle, to the outdoor blower chamber, the flow direction is changed into a direction along the longitudinal direction of the railway vehicle.