An LED lamp apparatus includes an LED and a light diffuser located on a light emission side of the LED. The light diffuser is made of at least one light transmittable material and has a light diffusing member at a peripheral portion of a light passing area of the LED. Alternatively, the light diffuser may be formed of at least one light transmittable material, and the light diffusing member may be located at a center portion of the light passing area of the LED.