A projector has a body, a rotating device, a projection device, and a supporting device. The body has a lower housing, an upper housing, and an operation chamber. The rotating device is mounted in the operation chamber, is located in the upper housing, and has a driving device, a rotating axle, a power supply circuit board, and a film base. The projection device is mounted in the operation chamber of the body and has a light unit, a Fresnel lens, a film holder, and a lens assembly. The supporting device is mounted on a bottom of the lower housing.