Abstract: This linear bearing comprises travel circuits for balls (3) which are held by needles (2). Each circuit is formed of passages constituting the longitudinal portions of the circuit and developed in two adjacent modules, these passages being connected at their ends by curved portions. The adjacent modules have resting faces which make it possible to arrange them side by side. A protruding part (23) is introduced into a longitudinal window (6) dimensioned to receive also a needle (2) which is arranged in the cutouts (44 and 45). On the one hand, the needle maintains the balls in their travel circuit and, on the other hand, it holds the modules together.The modules are obtained by injection in a mold having a single slide operating in a single direction while the balls and needles are parts of known type.