A rolling guide unit as provided here is capable of raising the degree of flexibility in design and simplifying the control of lubricating oil and has a low sliding resistance to the rolling elements. The rolling guide unit is provided with a cylindrical member 2 through which a rail 1 passes for it to slide on, raceway paths a constituted of a combination of the cylindrical member 2 and the rail 1, circuit paths b formed in the cylindrical member 2 and each making interconnection between the two ends of each of the raceway paths a by way of direction-changing recesses 18, and a plurality of rolling elements 19 placed in the circuit paths b and the raceway paths a. The rolling elements 19 circulate in the circuit paths b and the raceway paths a in accordance with the relative movement between the rail 1 and the cylindrical member 2. The rolling guide unit is characterized by mounting holes 20 formed in the cylindrical member 2; oiled members 21 respectively installed in the mounting holes 20; and oil-supply members 23 each provided along the contact faces of the rolling elements 19 traveling through either the raceway path a or the circuit path 1. The oil-supply members 23 are in contact with the oiled members 21.