In a surface mounting apparatus having a pair of substrate fixing portions disposed opposite to each other and serving to support and fix opposed ends of a substrate respectively and a mounting head for mounting a component held by an attached nozzle on the substrate which is supported and fixed by the substrate fixing portion, including an air injecting portion disposed close to the substrate fixing portion and serving to inject air like a curtain from an outside of the substrate which is supported and fixed above an upper surface of the substrate, and an air suctioning portion disposed close to the other substrate fixing portion and serving to suction the air at the outside of the substrate which is opposed to an ejecting direction of the air.