A connector for ribbon optical fiber comprises a plug (1) and a socket (2). The plug (1) movably connects with the socket (2) through buttons (106) which are set on the both sides of the front end of the plug, and an alignment core (12) which allows a ribbon optical fiber movably aligning in the inside movement is also set on the front end of the plug (1). In the connector for ribbon optical fiber of present invention, the plug (1) movably connects with the socket (2) through buttons (106), therefore repeated plugging and pulling can be achieved, and the optical fiber movably aligns inside the alignment core with the advantages of simple structure and good effect of alignment.