The present invention provides a component mounting apparatus and a component mounting method, it is possible to improve the efficiency of the installation of a mounting member with a pair of leads to a substrate, and improve productivity. The component mounting apparatus comprises: a mounting head which grasps the electronic component (2) having a pair of leads (4); mounting head moving mechanism, which moves the mounting head to insert the leads(4) of the electronic component(2) to the through hole of the substrate so as to mount an electronic component on a substrate; and a lead correction tool (17), having a pair of inclined surfaces (45) and a pair of inclined surfaces(55) inclining in different directions, by pressing the lead (4) of the electronic component(4) grasped by the mounting head moved by mounting head moving mechanism to the inclined surfaces (45) or the inclined surfaces(55), the leads (4) move closer or away from each other so that the width(Lw) of the leads is corrected.