Abstract: The invention has the object of providing an optic contact, that is to say the positioning and fixing of a termination (5) of an optic fibre in a connection terminal (4). According to the invention: the termination is inserted in the terminal in a manner to allow the termination a transverse play in the terminal; an optic signal is axially injected (120,110) into the core of the fibre through the end face (6) of the termination; the signal returned through this same end face is detected (110,130,140) on a point of this latter corresponding to a predetermined reference axis; the termination is displaced transversely (210,220; 210',220') in the terminal with respect to the reference axis as far as a position at which the amplitude of detected signal (S.sub.W) is a maximum, so that this position corresponds to an alignment of the axis of the core of the fibre on this reference axis; the termination is fixed in this position in the terminal.