The present invention provides a projection apparatus including an image generation device and a projection lens. The projection lens is disposed between a light valve of the image generation device and a projection screen, and the projection lens includes a plurality of lenses. The lenses include a first lens, a second lens and a third lens, and the first lens, the second lens and the third lens are aspherical lenses. An effective focal length of the projection lens is between 5 mm and 8 mm, and a sum of the effective focal length of the projection lens and a number of the lenses is between 14 and 17.