A loose component supply device includes a loose component support section that supports multiple components in a loose state, an imaging device that images the components supported on the loose component support section, a component holding head provided with at least one component holding tool capable of picking up and holding each of the components supported on the loose component support section, a holding head moving device that moves the component holding head at least to and from the loose component support section and a component transfer section at which transfer to a next process is possible, and a holding tool changing device that changes at least one of the one component holding tools based on image data obtained by the imaging of the imaging device.