Board conveyance device 24 is provided with a pair of conveyor belts 64 for conveying a board; and a lifter 70, 74, 78 that raises a board loaded on the pair of conveyor belts, and, in a state with board S raised by the lifter, a different board, board S′, is conveyed by the pair of conveyor belts. Also, a board work system includes such a board conveyance device and a board work device that performs work on the board raised by the lifter of the board conveyance device.