A bridge for a string instrument, which has a simple structure and is easily processed, is provided, whereby the material cost of the saddle is decreased and superior vibrancy of sound is provided. The bridge has a saddle body 50 that is formed with string grooves 55 at two ends thereof. The string groove 55 has a uniform portion 56 and deep groove portions 57. The deep groove portion 57 is formed into an arc shape in cross section and has a larger curvature radius than that of the uniform portion 56. The uniform portion 56 and the deep groove portion 57 cross with each other at a predetermined portion, and the vicinity of the predetermined portion has a chevron shape in vertical cross section. The chevron shapes of the deep groove portions 57 have peaks P that are arranged at different position in the circumferential direction.