An exemplary camera module includes a barrel, a holder, and an resilient member. The holder is loosely threadedly coupled to the barrel. The holder has a central axis. The resilient member is positioned between the barrel and the holder. The resilient member is configured for exerting a first elastic force to the barrel and a second elastic force to the holder so that the barrel is fixed with the holder. The first and second elastic forces are in a direction parallel to the central axis of the holder.