Fm
The F minor bar chord is actually an open E minor chord moved up one fret, with the first finger barring across the first fret. This minor chord can be formed from the root 6 major bar chord by simply lifting off the second finger. Like the major chord, the basic shape can be moved up and down the fretboard; its name once again being taken from the 6th string note, e.g., Fm on the first fret, Gm on the third fret, Am on the fifth fret and so on.