The present invention discloses a type of optical fiber connector, comprising: an external shell; an internal shell, installed within said external shell; an inserted core component, contained within said internal shell and comprising an inserted core and a length of optical fiber pre-installed within said inserted core; and a spring, contained within said internal shell and located behind said inserted core, and being for exerting a pre-set axial force on said inserted core. Said internal shell includes a front part and a rear part; said rear part is assembled on said front part. Additionally, said spring is compressed between said rear part and said inserted core. In the present invention, the rear part can act as a retainer for the compressed spring and can also be for securing the Kevlar fiber extension tube of the optical cable. As a result, in comparison to the prior art, the present invention reduces the number of components of the optical fiber connector and simplifies the structure of the optical fiber connector, thus facilitating rapid on-site assembly of the optical fiber connector.