stage prop; set piece
Refers to physical items used on a theater stage, including furniture, decorations, and handheld props.
Please help put away the stage props.
In this play, the set pieces play a very important role.
小道具 refers specifically to small handheld props, while 舞台道具 is a broader term covering all stage items including larger set pieces.
大道具 refers to large stage equipment and set constructions, whereas 舞台道具 is a more general term for any stage property.
Compound of 舞台 (stage) and 道具 (tool, implement). The meaning is transparent from its components.