Back Bassposaune German Bassopasuuna Finnish Trombone basse French Trombon dùrd Scots/Gaelic バストロンボーン Japanese Бас-тромбон Russian
 Bass trombone with two valves in F and D | |
| Brass instrument | |
|---|---|
| Classification | |
| Hornbostel–Sachs classification | 423.22 (Sliding aerophone sounded by lip vibration) |
| Developed | Late 16th century |
| Playing range | |
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| Related instruments | |
| Musicians | |
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The bass trombone (German: Bassposaune, Italian: trombone basso) is the bass instrument in the trombone family of brass instruments. Modern instruments are pitched in the same B♭ as the tenor trombone but with a larger bore, bell and mouthpiece to facilitate low register playing, and usually two valves to fill in the missing range immediately above the pedal tones.