A toroidal continuously variable transmission, comprising: a casing; a rotary shaft which is rotatably supported in the casing; a pair of outer discs (2a, 2b) which is supported at both end portions of the rotary shaft rotatably as being synchronized with the rotary shaft in a state that respective axial-direction one-side surfaces each having an arc-shaped section are mutually opposed; an inner disc which is supported at a periphery of a middle portion of the rotary shaft as being rotatable relatively to the rotary shaft in a state that axial-direction two-side surfaces each having an arc-shaped section are opposed respectively to the axial-direction one-side surfaces of the outer discs (2a, 2b); support members which are arranged by two or more respectively between the axial-direction two-side surface of the inner disc and the axial-direction one-side surface of each of the outer discs (2a, 2b) with respect to the axial direction as being swingable about pivot shafts located at twisted positions relatively to the rotary shaft; and power rollers which are rotatably supported respectively by the support members, each power roller including a peripheral surface as a spherically-shaped convex surface, as having the peripheral surface contacted to the axial-direction two-side surface of the inner disc and the axial-direction one-side surface of each of the outer discs (2a, 2b) wherein a small end face of the inner disc is rotatably supported by ball bearings to a fixing member (8a, 8b) which is fixed to an inner surface of the casing, and characterized in that a bearing ring of the ball bearing is formed integrally at the small end surface of the inner disc and at least a part of the bearing ring is axially overlapped with a traction surface which is a boundary surface between the power roller and the inner disc. a casing; a rotary shaft which is rotatably supported in the casing; a pair of outer discs (2a, 2b) which is supported at both end portions of the rotary shaft rotatably as being synchronized with the rotary shaft in a state that respective axial-direction one-side surfaces each having an arc-shaped section are mutually opposed; an inner disc which is supported at a periphery of a middle portion of the rotary shaft as being rotatable relatively to the rotary shaft in a state that axial-direction two-side surfaces each having an arc-shaped section are opposed respectively to the axial-direction one-side surfaces of the outer discs (2a, 2b); support members which are arranged by two or more respectively between the axial-direction two-side surface of the inner disc and the axial-direction one-side surface of each of the outer discs (2a, 2b) with respect to the axial direction as being swingable about pivot shafts located at twisted positions relatively to the rotary shaft; and power rollers which are rotatably supported respectively by the support members, each power roller including a peripheral surface as a spherically-shaped convex surface, as having the peripheral surface contacted to the axial-direction two-side surface of the inner disc and the axial-direction one-side surface of each of the outer discs (2a, 2b) wherein a small end face of the inner disc is rotatably supported by ball bearings to a fixing member (8a, 8b) which is fixed to an inner surface of the casing, and characterized in that a bearing ring of the ball bearing is formed integrally at the small end surface of the inner disc and at least a part of the bearing ring is axially overlapped with a traction surface which is a boundary surface between the power roller and the inner disc.