A power supply device that supplies power from a power transmission coil to a power reception coil that is provided to a vehicle in a non-contact manner by means of at least a magnetic coupling, comprising: a communication means that receives a startup signal transmitted via wireless communication by the vehicle for activating the power supply device; a notification means for notifying a state of the power supply device; a detection means for detecting the state of the power supply device based on the startup signal; and a control means for controlling the notification means based on a detection result of the detection means; wherein the detection means detects a non-contact power supply possible state, which represents a state in which the power can be supplied from the power transmission coil in a non-contact manner, and detects a recoverable state, which represents a state in which a user of the vehicle is able to recover the power supply device from a state in which the power cannot be supplied in a non-contact manner to the non-contact power supply possible state the control means sets a notification state of the notification means to a first notification state, when the detection means detects the non-contact power supply possible state, and sets the notification state of the notification means to a state that is different from the first notification state, when the detection means is not detecting the non-contact power supply possible state, and sets the notification state of the notification means to a second notification state, when the detection means detects the recoverable state, wherein the notification state is set before the vehicle is parked in a chargeable area. a communication means that receives a startup signal transmitted via wireless communication by the vehicle for activating the power supply device; a notification means for notifying a state of the power supply device; a detection means for detecting the state of the power supply device based on the startup signal; and a control means for controlling the notification means based on a detection result of the detection means; wherein the detection means detects a non-contact power supply possible state, which represents a state in which the power can be supplied from the power transmission coil in a non-contact manner, and detects a recoverable state, which represents a state in which a user of the vehicle is able to recover the power supply device from a state in which the power cannot be supplied in a non-contact manner to the non-contact power supply possible state the control means sets a notification state of the notification means to a first notification state, when the detection means detects the non-contact power supply possible state, and sets the notification state of the notification means to a state that is different from the first notification state, when the detection means is not detecting the non-contact power supply possible state, and sets the notification state of the notification means to a second notification state, when the detection means detects the recoverable state, wherein the notification state is set before the vehicle is parked in a chargeable area.