Abstract: An optical fiber plug for high density optical fiber connections is proposed for matching with an optical fiber adapter, and includes a body with an elastic buckling member (130) to buckle the adapter, and an ejecting assembly actuated at the same time when the buckling member (130) is actuated to release the body and from the adapter. The ejecting assembly includes an ejecting spring (420) and an ejecting rod (410) arranged in the body. The ejecting rod (410) is ejected from the body when the ejecting assembly is actuated, and stopped on the adapter to eject the body out of the adapter. The optical fiber plug can be automatically ejected out of the adapter when the buckling member (130) of the plug is actuated, thus solving the problem of operational difficulties caused by reducing the geometric size of the plug, and realizing high density optical fiber connections with optical fiber jumpers.