Frets can be provided for stringed instruments without requiring a process for scraping both ends of a fret main body after the frets are installed into a fingerboard of a stringed instrument. Both ends of the fret main body are formed in a shape along a cross-sectional shape of the fingerboard at both sides of the fingerboard when the frets are driven into fret grooves of a fingerboard. Each of the frets is provided with a fret main body for dividing a surface of the fingerboard and a leg portion standing unitedly on an underside of the fret main body.