A bridge for a stringed instrument located on an upper surface of a body of the stringed instrument including lever arm retainers located on the upper surface of the body. Each lever arm retainer corresponds to one of the strings. Each lever arm retainer includes a support shaft extending in a direction perpendicular to the corresponding string. Lever arms are supported by the support shafts. Each lever arm retains an end of one of the strings and is rotatable about the corresponding support shaft. Each fine tuning bolt includes a contact portion that abuts against the corresponding lever arm above the body. Each contact portion is continuously adjustable in the height direction of the body. The tuner device discretely changes the height of the contact portion.