The B half-diminished seventh chord, often notated as Bm7♭5, is a four-note chord consisting of B (root), D (minor third), F (diminished fifth), and A (minor seventh). This chord is constructed by combining a diminished triad with a minor seventh, creating a sound that is tense, moody, and unresolved. The B half-diminished seventh chord is commonly used in jazz, classical, and contemporary music to add harmonic complexity and serve as a passing or connecting chord within progressions. Its unique interval structure provides a dark yet flexible tonal quality, allowing musicians to explore subtle emotional nuances and smooth transitions while maintaining a sophisticated harmonic framework.
Name: B half-diminished seventh chord
Symnonyms:: B half-diminished chord, B minor seventh flat five chord
Notes: B, D, F, A
Intervals: 1, ♭3, ♭5, ♭7
Chord symbol: Bm7(♭5)
Alternative symbols: Bø, Bø7, Bm7♭5, B–7(♭5), Bmi7(♭5), BminBmin
Type: Tetrad (four-note chord)
B half-diminished seventh chord on the Staff
B half-diminished seventh chord on Piano
B half-diminished seventh chord on Guitar
B half-diminished seventh chord on Ukulele
Rowan Ellis is a musician and educator with a passion for exploring the language of harmony and melody. With years of experience across classical, jazz, and contemporary styles, Rowan breaks down music theory into clear, practical insights. His goal is to make chords and scales less intimidating and more inspiring for every musician.