A work machine comprising: a movable part; an actuator that drives the movable part; a drive manipulation unit (51, 52) that receives a drive manipulation instructing the actuator to operate; a drive control unit that controls the operation of the actuator in response to the drive manipulation; a preparatory manipulation unit that receives a preparatory manipulation instructing the actuator to prepare for the operation; characterized by a state switching unit (61, 43x) that shifts a state of the actuator in response to the preparatory manipulation from a suspended state in which the actuator is blocked from being started by control of the drive control unit to a standby state in which the actuator is able to be started by the control of the drive control unit; a display device configured to display an image; an obstacle detection device that detects an obstacle existing in one or more monitoring areas that are set to correspond to the movable part; a state determination unit that determines whether the state of the actuator is the standby state or the suspended state under circumstances where the actuator is at a stop; and a display control unit, wherein on determination that the state of the actuator is the standby state, the display control unit executes automatic image output that is processing for causing the display device to display a monitoring image that is an image corresponding to a monitoring area in which the obstacle is detected out of the one or more monitoring areas, and on determination that the state of the actuator is the suspended state, the display control unit stops the execution of the automatic image output. a movable part; an actuator that drives the movable part; a drive manipulation unit (51, 52) that receives a drive manipulation instructing the actuator to operate; a drive control unit that controls the operation of the actuator in response to the drive manipulation; a preparatory manipulation unit that receives a preparatory manipulation instructing the actuator to prepare for the operation; characterized by a state switching unit (61, 43x) that shifts a state of the actuator in response to the preparatory manipulation from a suspended state in which the actuator is blocked from being started by control of the drive control unit to a standby state in which the actuator is able to be started by the control of the drive control unit; a display device configured to display an image; an obstacle detection device that detects an obstacle existing in one or more monitoring areas that are set to correspond to the movable part; a state determination unit that determines whether the state of the actuator is the standby state or the suspended state under circumstances where the actuator is at a stop; and a display control unit, wherein on determination that the state of the actuator is the standby state, the display control unit executes automatic image output that is processing for causing the display device to display a monitoring image that is an image corresponding to a monitoring area in which the obstacle is detected out of the one or more monitoring areas, and on determination that the state of the actuator is the suspended state, the display control unit stops the execution of the automatic image output.