Abstract: An asphalt finisher includes a tractor; a screw configured to lay and spread a paving material rearward of the tractor; a screed configured to compact the paving material rearward of the screw; a retaining plate disposed in front of the screw; and a connector configured to connect the screed and the retaining plate. The screed is configured to be extendible or contractible in a width of the screed in a vehicle-width direction. The retaining plate is configured to be extendible or contractible in a width of the retaining plate in the vehicle-width direction in conjunction with, via the connector, extension or contraction of the width of the screed in the vehicle-width direction.

Abstract: An asphalt finisher includes a screed configured to move in a construction direction and level a paving material; a screed extendible or contractible cylinder configured to extend or contract in accordance with supply of hydraulic oil, thereby moving a side frame that is a limit of leveling by the screed; a hydraulic pump configured to supply the hydraulic oil to the screed extendible or contractible cylinder; a switching valve configured to switch a supply target of the hydraulic oil; and a proportional valve configured to adjust a flow rate of the hydraulic oil. The switching valve and the proportional valve are provided in a path between the hydraulic pump and the screed extendible or contractible cylinder.