A vehicle approach alert device that is configured to output an approach report sound representing an approach of a vehicle from a sounding body, the vehicle approach alert device comprising: a memory part in which data of the approach report sound is memorized; a signal generator that is configured to read out the data of the approach report sound from the memory part and to generate a voltage waveform signal of the approach report sound based on the data of the approach report sound; a calculator that is configured to calculate a temperature of the sounding body; and a correct part that is configured to correct the approach report sound based on the temperature of the sounding body calculated by the calculator, characterized in that the calculator is configured to acquire information about a temperature detected by a temperature sensor (1b, 1c) located at a position different from the sounding body in the vehicle, and to estimate the temperature of the sounding body based on the temperature detected by the temperature sensor, wherein the temperature sensor is configured to detect an outside air temperature outside of the vehicle, and the calculator is configured to acquire information about the outside air temperature, and to estimate the temperature of the sounding body based on the outside air temperature, the vehicle approach alert device further comprising: another temperature sensor that is configured to detect a temperature of another component different from the sounding body in the vehicle, wherein the calculator is configured to acquire information about the temperature of the another component, and to estimate the temperature of the sounding body based on the outside air temperature and the temperature of the another component. a memory part in which data of the approach report sound is memorized; a signal generator that is configured to read out the data of the approach report sound from the memory part and to generate a voltage waveform signal of the approach report sound based on the data of the approach report sound; a calculator that is configured to calculate a temperature of the sounding body; and a correct part that is configured to correct the approach report sound based on the temperature of the sounding body calculated by the calculator, characterized in that the calculator is configured to acquire information about a temperature detected by a temperature sensor (1b, 1c) located at a position different from the sounding body in the vehicle, and to estimate the temperature of the sounding body based on the temperature detected by the temperature sensor, wherein the temperature sensor is configured to detect an outside air temperature outside of the vehicle, and the calculator is configured to acquire information about the outside air temperature, and to estimate the temperature of the sounding body based on the outside air temperature, the vehicle approach alert device further comprising: another temperature sensor that is configured to detect a temperature of another component different from the sounding body in the vehicle, wherein the calculator is configured to acquire information about the temperature of the another component, and to estimate the temperature of the sounding body based on the outside air temperature and the temperature of the another component. another temperature sensor that is configured to detect a temperature of another component different from the sounding body in the vehicle, wherein the calculator is configured to acquire information about the temperature of the another component, and to estimate the temperature of the sounding body based on the outside air temperature and the temperature of the another component.