PURPOSE: To attain the excellent guide characteristic of a cage with small consumption of material by arranging comb webs radially facing each other to guide rollers, on both sides of a circular ring or ring segments.

CONSTITUTION: A comb cage 1 comprises four ring segments 2, and comb webs 5, 6 radially facing each other on both sides are arranged in a center range 3 of ring segments of the same shape with constant width. The comb webs 5, 6 grip rollers 7 at the height of a rolling axis 9 by comb faces 8 formed in recessed face shape. In such a shape, the comb cage 1 is guided and held by the rollers 7 since the height 10 of the comb cage 1 is smaller than the diameter of the roller 7. The total height of the comb cage 1 and a guide member 14 is smaller than the diameter of the roller 7, and even if the roller guide of the comb cage wears due to long-term use, the whole surface of the comb cage comes in contact with a rolling path to prevent the damage of a lubricating film.