To provide a linear guide characterized by having a smaller cross section than a usual guide having the same roller size and load capacity.

A lengthwise cavity having a square section preferably is formed in a fixed lengthwise support member 2, and a main slide cursor 6 combined with at least one auxiliary cursor 10 is held inside the cavity. Both of these two cursors support rollers 8a, 8b, 8c and 8d slidable along four races 9a, 9b, 9c and 9d coinciding with the sides of the lengthwise cavity which is so disposed that the diagonal line coincides with the line II-II of action of a load P supported by a linear guide.