Abstract: A locomotive cab seat includes a rotatable seat portion; a fixed backrest adjacent the seat portion; a first armrest having a generally vertically disposed, planar side portion; and a second, vertically adjustable armrest on the side of the seat portion generally opposite the first armrest. The first armrest is mounted pivotally so as to be capable of being urged toward the sidewall of the locomotive cab, and the second armrest includes an adjustment mechanism whereby the second armrest may be maintained in a raised position or may be moved conveniently to a lowered position.