A lens holder able to equalize air pressure at all times with the ambient atmosphere includes a packaging member and a support member. The packaging member has upper and lower surfaces, and the packaging member includes a first through hole and a groove in communication with the first through hole. The support member has first and second surfaces and includes a second through hole and a vent hole in communication with the second through hole. The packaging member is mounted to the second surface of the support member, the first through hole is in communication with the second through hole, and the vent hole of the support member is in communication with the groove of the packaging member. A camera module including the lens holder is also provided.