Provided are a battery temperature regulation system capable of efficiently heating and/or cooling a battery, and a battery temperature regulation unit suitable for use in the battery temperature regulation system. The battery temperature regulation system 10 is provided with a thermally conductive member (e.g., a heat pipe 11) thermally connected to a battery 1, a heating device (e.g., a heater 12) that heats the battery 1 via the thermally conductive member and/or a cooling device (e.g., an air conditioning apparatus) that cools the battery 1 via the thermally conductive member.