A distortable rolling element retainer belt and a linear motion guide apparatus include a flat belt with holes defined therein and a separating portion is located between the adjacent holes. An upper spacer and a lower spacer are connected to each separating portion and a recess is defined between each separating portion and the upper spacer as well as between each separating portion and the lower spacer. The two recesses are located at different sides of the upper and the lower spacers so that the spacers on the rolling element retainer belt can be distorted to overcome the resistance from bending when the rolling elements traveling in a circulating passage which is not perpendicular to the surface of the rolling element retainer belt.