A deceleration information notification device comprising: a drive torque detecting unit for detecting a drive torque (Te) of a rotational drive source; a regeneration amount detecting unit for detecting a regeneration amount of a regeneration brake; a deceleration information setting unit for setting deceleration information indicating at least one of a driver's intention of deceleration and a vehicle deceleration state depending on the drive torque (Te) and the regeneration amount detected by the regeneration amount detecting unit when the drive torque (Te) detected by the drive torque detecting unit has a negative value; and a notification unit for notifying the deceleration information set by the deceleration information setting unit to a driver, wherein: the deceleration information setting unit refers to a map showing an inverted S-shaped curve and which is used to calculate the sound volume adjustment coefficient (kt), and based on which a degree of notification of the deceleration information is defined depending on the drive torque (Te) detected by the drive torque detecting unit to determine the degree of the notification, and the rate of increase of the degree of notification with respect to the drive torque (Te) is set to be small in a region in which the absolute value of the drive torque (Te) is small and also small in a region in which the absolute value of the drive torque (Te) is large and is set to be large in an intermediate region therebetween. a drive torque detecting unit for detecting a drive torque (Te) of a rotational drive source; a regeneration amount detecting unit for detecting a regeneration amount of a regeneration brake; a deceleration information setting unit for setting deceleration information indicating at least one of a driver's intention of deceleration and a vehicle deceleration state depending on the drive torque (Te) and the regeneration amount detected by the regeneration amount detecting unit when the drive torque (Te) detected by the drive torque detecting unit has a negative value; and a notification unit for notifying the deceleration information set by the deceleration information setting unit to a driver, wherein: the deceleration information setting unit refers to a map showing an inverted S-shaped curve and which is used to calculate the sound volume adjustment coefficient (kt), and based on which a degree of notification of the deceleration information is defined depending on the drive torque (Te) detected by the drive torque detecting unit to determine the degree of the notification, and the rate of increase of the degree of notification with respect to the drive torque (Te) is set to be small in a region in which the absolute value of the drive torque (Te) is small and also small in a region in which the absolute value of the drive torque (Te) is large and is set to be large in an intermediate region therebetween. the deceleration information setting unit refers to a map showing an inverted S-shaped curve and which is used to calculate the sound volume adjustment coefficient (kt), and based on which a degree of notification of the deceleration information is defined depending on the drive torque (Te) detected by the drive torque detecting unit to determine the degree of the notification, and the rate of increase of the degree of notification with respect to the drive torque (Te) is set to be small in a region in which the absolute value of the drive torque (Te) is small and also small in a region in which the absolute value of the drive torque (Te) is large and is set to be large in an intermediate region therebetween.