In an evaporator unit, a first evaporator is coupled to an ejector to evaporate refrigerant flowing out of the ejector, a second evaporator is coupled to a refrigerant suction port of the ejector to evaporate the refrigerant to be drawn into the refrigerant suction port, a flow amount distributor is located to adjust a flow amount of the refrigerant distributed to the nozzle portion and a flow amount of the refrigerant distributed to the second evaporator, and a throttle mechanism is provided between the flow amount distributor and the second evaporator to decompress the refrigerant flowing into the second evaporator. The flow amount distributor is adapted as a gas-liquid separation portion and as a refrigerant distribution portion for distributing separated refrigerant into the nozzle portion and the second evaporator. Furthermore, the flow amount distributor and the ejector are arranged in line in a longitudinal direction of the ejector.