An apparatus for producing a fiber-reinforced strand produced by causing a reinforced fiber bundle to pass through a resin bath means storing a molten thermoplastic resin and twisting the reinforced fiber bundle after resin impregnation about a bundle center by a twisting means provided downstream of the resin bath means, wherein the apparatus comprises the resin bath means including a resin impregnation region where the reinforced fiber bundle is impregnated with the thermoplastic resin and a twisting region where the reinforced fiber bundle after the resin impregnation region can be twisted by the twisting means, the twisting means arranged downstream of the resin bath means, wherein the twisting means is adapted to twist the fiber-reinforced strand, and a twisting means handling means adapted to handle the twisting means to make the twisting means twist the reinforced fiber bundle to produce the fiber-reinforced strand in such a manner that a twist imparted to the reinforced fiber bundle in the twisting region satisfies: L 3 ≥ P ≥ 3.15 90 dtex where dtex: decitex of reinforced fibers, decitex meaning a weight in gram of the reinforced fiber bundle per 10 000 m, L: length (in mm) of the twisting region of the resin bath means, wherein the twisting region is a region between a most downstream impregnation roll of a plurality of impregnation rolls arranged rotatably in the resin bath means and a die for shaping the thermoplastic resin covering the reinforced fiber bundle to form a cross-sectional shape, wherein the die is provided in an exit portion of the resin bath means, wherein at the exit portion the reinforced fiber bundle after resin impregnation is pulled out to outside, P: twist pitch (in mm) imparted to the reinforced fiber bundle, a twist pitch of 300 mm meaning that a strand is twisted one turn while 0.3 m of the strand is taken up. the apparatus comprises the resin bath means including a resin impregnation region where the reinforced fiber bundle is impregnated with the thermoplastic resin and a twisting region where the reinforced fiber bundle after the resin impregnation region can be twisted by the twisting means, the twisting means arranged downstream of the resin bath means, wherein the twisting means is adapted to twist the fiber-reinforced strand, and a twisting means handling means adapted to handle the twisting means to make the twisting means twist the reinforced fiber bundle to produce the fiber-reinforced strand in such a manner that a twist imparted to the reinforced fiber bundle in the twisting region satisfies: L 3 ≥ P ≥ 3.15 90 dtex where dtex: decitex of reinforced fibers, decitex meaning a weight in gram of the reinforced fiber bundle per 10 000 m, L: length (in mm) of the twisting region of the resin bath means, wherein the twisting region is a region between a most downstream impregnation roll of a plurality of impregnation rolls arranged rotatably in the resin bath means and a die for shaping the thermoplastic resin covering the reinforced fiber bundle to form a cross-sectional shape, wherein the die is provided in an exit portion of the resin bath means, wherein at the exit portion the reinforced fiber bundle after resin impregnation is pulled out to outside, P: twist pitch (in mm) imparted to the reinforced fiber bundle, a twist pitch of 300 mm meaning that a strand is twisted one turn while 0.3 m of the strand is taken up.