A linear guidance system including a guide rail (1) and a carriage (2) which is guided displaceably on the guide rail by way of at least two ball bearings (3, 3′), wherein the ball bearings respectively comprise a plurality of balls (4) and a ball cage (5) and the guide rail (1) has running surfaces (9, 9′) and the carriage (2) has running surfaces (10, 10′) for the rolling movement of the balls (4) of the ball bearings (3, 3′), wherein the carriage (2) includes a profile member (11) which is substantially C-shaped in cross-section, wherein the running surfaces (10, 10′) are provided at the respective end portions (11′, 11″) of the C-shaped profile member (11) and the carriage (2) further includes a plate (12) which extends between the end portions (11′, 11″) of the C-shaped profile member (11) of the carriage (2) and is connected to said end portions (11′, 11″), forming a closed hollow profile.