A core wire (2b) of an optical fiber (2) on which a metalized layer is not formed is housed in a fixing groove (7) having a V shaped cross section. A solder (8) is filled into a space between holding portion (3b) of a support substrate (3) and an upper substrate (4), each having metalized layers (3c) and 4(a), respectively, formed thereon, and the core wire is fixed therebetween. The support and upper substrates are fixed to one another by being bonded with solder (8), which wets along each of the metalized layers. Optical fiber (2) pinched therebetween is free of a metalized layer, and as such, is free of the forces of bonding with the solder, and is securely fixed by the pinching force from both of the support and upper substrate faces. In this manner, there is provided an optical fiber array for fixing an optical transmission member such as an optical fiber to a predetermined position, wherein each optical transmission member can be securely fixed into a groove by using the solder, and a gap is unlikely to occur between the optical transmission member and the groove.