In a rolling element accommodating belt having a rolling element accommodating section for individually accommodating a plurality of balls at predetermined intervals while the plurality of balls are rolling and circulating in an infinite circulating passage of linear guide, the rolling element accommodating belt accommodates the balls in the rolling element accommodating section and aligns the balls in the direction of aligning balls in the infinite circulating passage. The rolling element accommodating section includes: a restraint accommodating section for restricting the accommodated balls in all directions; and a no-restraint accommodating section in which the accommodated balls are not restrained at least in one direction.