To provide a starter in which the power consumption of a battery is reduced by preventing a starter motor from being unnecessarily driven and stable startability is ensured.

This starter of an LPI vehicle having the battery and the starter motor comprises an ignition switch selecting a contact with an ignition key, a starter switch outputting an engine start on request signal, an ECU detecting the temperature and pressure of a fuel pressurized against an injector when the engine start on request signal is output, determining whether the fuel maintains the liquid state or not, and controlling the driving of the starter motor under the condition that the fuel maintains the liquid state, and a relay driving the starter motor by the control of the ECU.