band member; member of a (rock) band
Commonly refers to a member of a rock or pop band, especially in casual contexts.
from English bandman
He tours the country as a professional band member.
In my student days, I admired band members and started playing guitar.
Rare term; may refer to a member of a military or brass band, but this usage is uncommon in modern Japanese.
In older texts, 'バンドマン' can refer to a military bandsman.