A tripod constant velocity joint according to an embodiment of the present invention includes: a housing having a tubular shape that forms three track grooves arranged along a circumferential direction; a spider having a hub placed inside the housing and three journals respectively extending radially outward from the hub and respectively arranged in the track grooves; and three bearing units respectively engaged to the journals. Each of the bearing units comprises a track race that is arranged in the track groove in a state of being tiltably engaged to the journal and a first and a second ball array that are disposed between a peripheral surface of the track race and power transmission surfaces facing each other in a circumferential direction to form the track grooves and respectively comprise a plurality of balls. The first and second ball arrays are arranged at different positions along a length direction of the journal.

In a manufacturing method of a track race disposed between a housing and a spider of a tripod constant velocity joint and having a ball groove an opening of which is narrowed, an end section for forming the narrowed opening of the ball groove is formed on an intermediate workpiece for manufacturing the track race through machining process or plastic deformation process.