A stabilizer device for being mounted to a vehicle body, the stabilizer device comprising: a bar which has a torsion portion and arm portions (120a, 120b) extending from both end portions of the torsion portion; a tubular resin member (40, 41) which is fixed at the torsion portion and has a length in an axial direction; and a bush (30, 31) which is fixed at the periphery of the tubular resin member (40, 41) and has a length in an axial direction; a bracket (20, 24) made of a metal and covering the bush (30, 31) from a lower side, the bracket (20, 24) being fixed on a frame portion of the vehicle body by bolts, wherein the length of the tubular resin member (40, 41) is equal to or longer than that of the bush (30, 31), the tubular resin member (40, 41) is a resin ring, the tubular resin member (40, 41) has a peripheral surface having a recess or a convex at a center portion of an axial direction of the resin member (40, 41), and when the peripheral surface of the tubular resin member (40, 41) has the recess, the bush (30, 31) has an inner peripheral surface having a convex at a center portion of an axial direction of the bush (30, 31), and the convex of the bush (30, 31) engages with the recess of the resin member (40, 41), and when the peripheral surface of the tubular resin member (40, 41) has the convex, the bush (30, 31) has an inner peripheral surface having a recess at a center portion of an axial direction of the bush (30, 31), and the recess of the bush (30, 31) engages with the convex of the resin member (40, 41), characterized in that the recess or convex of the resin member (40, 41) is curved and the convex or recess of the bush (30, 31) is curved, and that the bracket (20, 24) is embedded to the bush (30, 31) that protrudes outwardly from a front side and a rear side of the bracket (20, 24) when the bolts are screwed, and the bracket (20, 24) is provided at both its axial direction edges with flanges (20a, 20b), wherein an axial direction size of the bracket (20, 24) is set smaller than that of the bush (30, 31), and presses the bush (30, 31) on the tubular resin member (40, 41) so as to fix the bush (30, 31) to the tubular resin member (40, 41). a bar which has a torsion portion and arm portions (120a, 120b) extending from both end portions of the torsion portion; a tubular resin member (40, 41) which is fixed at the torsion portion and has a length in an axial direction; and a bush (30, 31) which is fixed at the periphery of the tubular resin member (40, 41) and has a length in an axial direction; a bracket (20, 24) made of a metal and covering the bush (30, 31) from a lower side, the bracket (20, 24) being fixed on a frame portion of the vehicle body by bolts, wherein the length of the tubular resin member (40, 41) is equal to or longer than that of the bush (30, 31), the tubular resin member (40, 41) is a resin ring, the tubular resin member (40, 41) has a peripheral surface having a recess or a convex at a center portion of an axial direction of the resin member (40, 41), and when the peripheral surface of the tubular resin member (40, 41) has the recess, the bush (30, 31) has an inner peripheral surface having a convex at a center portion of an axial direction of the bush (30, 31), and the convex of the bush (30, 31) engages with the recess of the resin member (40, 41), and when the peripheral surface of the tubular resin member (40, 41) has the convex, the bush (30, 31) has an inner peripheral surface having a recess at a center portion of an axial direction of the bush (30, 31), and the recess of the bush (30, 31) engages with the convex of the resin member (40, 41), characterized in that the recess or convex of the resin member (40, 41) is curved and the convex or recess of the bush (30, 31) is curved, and that the bracket (20, 24) is embedded to the bush (30, 31) that protrudes outwardly from a front side and a rear side of the bracket (20, 24) when the bolts are screwed, and the bracket (20, 24) is provided at both its axial direction edges with flanges (20a, 20b), wherein an axial direction size of the bracket (20, 24) is set smaller than that of the bush (30, 31), and presses the bush (30, 31) on the tubular resin member (40, 41) so as to fix the bush (30, 31) to the tubular resin member (40, 41).