Construction machine

A construction machine comprising:

• an engine that is mounted on a vehicle body and serves as a prime mover;
• a hydraulic pump that is driven by the engine and delivers pressurized oil;
• a hydraulic actuator driven by the pressurized oil delivered from the hydraulic pump;
• a gate lock lever that is provided in an entrance of a driver's seat of the vehicle body and is switched to a lock position prohibiting a drive of the hydraulic actuator and a lock release position allowing the drive of the hydraulic actuator;
• a controller configured to have an idling stop function of automatically stopping the engine when a state where the gate lock lever is in the lock position lasts for a specified time;
• and
• a horn switch to be operated at the time of generating sounds to the surroundings of the vehicle body from a horn, characterized in that:
• in a case where an elapse time after the engine is automatically stopped by the idling stop function does not yet reach a preset restart standby time, the controller is configured to perform control of restarting the engine in a state where the horn switch is operated and the gate lock lever is in the lock position, and
• in a case where the elapse time after the engine is automatically stopped by the idling stop function has reached the restart standby time, the controller is configured to perform control of stopping a power supply of the vehicle body.