A battery temperature control device comprises: a battery including a battery cell; and a thermally conductive member having one end portion thermally connected to the battery, wherein another end portion of the thermally conductive member is thermally connected to a fin of a condenser and/or an evaporator, and the fin of the condenser and/or the evaporator is disposed at a passage through which a fluid flows and the passage is brandied into a plurality of paths at a position downstream of the fin of the condenser and/or the evaporator in a direction of a flow of the fluid.