PERIPHERY MONITORING DEVICE

A periphery monitoring device includes: an acquisition unit configured to acquire a captured image from an imaging unit that captures an image of a periphery of a vehicle and positional information regarding an attention area set around the vehicle; and a controller configured to superimpose and display an own vehicle image showing a position of the vehicle and an indicator indicating a position of the attention area based on the positional information on a peripheral image as a bird's-eye view image based on the captured image, and to perform display such that a display mode of the indicator changes over time.