In a linear antifriction bearing comprising a guide rail (1) which has
a U-shaped cross section and on whose inner side raceways (4) parallel to
the rail longitudinal direction are arranged, and comprising a running carriage
(2) which can be displaced longitudinally and is supported by rolling elements
(3) on the raceways (4) inside the guide rail (1), the rolling
elements (3) are arranged in a plurality of endless tracks on a supporting
body (5) of the running carriage (2). According to the invention,
the supporting body (5) has an opening parallel to the raceways (4),
and return channels are formed by a filling body (8) which is arranged in
the opening and which has recesses (15) which run in the longitudinal direction
to accommodate returning rolling elements (3).
