1. A component placing method comprising: holding each of the plurality of components releasably by a respective component holding member of a plurality of component holding members, each component holding member of the plurality of component holding members having a central axis and the plurality of component holding members being arranged in a row; sequentially capturing an image of each component from a direction along the central axis of the respective component holding member and sequentially capturing an image of each component from a direction generally orthogonal to both the central axis of the respective component holding member and a direction of the arrangement of the plurality of component holding members; recognizing a holding posture of each component on the respective component holding member on a basis of the image captured from the direction along the central axis of the respective component holding member and the image captured from the direction generally orthogonal to both the central axis of the respective component holding member and the direction of the arrangement of the plurality of component holding members; and placing each component on a circuit board on a basis of the recognized holding posture of each component on the respective component holding member, wherein the image of each component from the direction along the central axis of the respective component holding member is an image of a component imaging plane of a respective component of the plurality of components, the component imaging plane of the respective component being a plane orthogonal to the central axis of the respective component holding member and being a placement surface of the respective component upon which light is incident, and wherein the image of the component imaging plane of each component is captured in a state in which a horizontal light emitting unit emits rays of horizontal light in a generally parallel direction to the component imaging plane, a vertical light emitting unit emits rays of vertical light in a generally orthogonal direction to the component imaging plane, and an inclined light emitting unit emits rays of light inclined at a generally medial angle between the rays of horizontal light and the rays of vertical light, simultaneously and directly illuminating the component imaging plane of each component.