Abstract: An optical fiber connector includes two connecting seats each having a first side formed with a plane and a second side integrally formed with an insertion hole extended to the plane, and a connecting tube mounted between the connecting seats. Thus, each of the connecting seats is integrally formed with the insertion hole, and the two ends of the connecting tube are inserted into the insertion hole of each of the connecting seats respectively, so that the two optical fiber cables inserted into the connecting tube can form a co-axial connection state and can be connected with each other exactly.

Abstract: An adapter connector includes an insertion terminal, a connecting member, a plurality of connecting tubes, and a plurality of optical fiber cables. Thus, by connection of the quick connector and the insertion posts of the connecting member, each of the optical fiber cables is connected to the testing instrument stably and efficiently, thereby facilitating the testing instrument performing the testing procedures. In addition, each of the optical fiber cables can be removed from the respective connecting tube easily and rapidly, thereby shortening the testing time, and thereby enhancing the testing efficiency.