A component supply device including a component support which supports multiple components in a scattered state; a first component holding tool which holds a component of the multiple components which is supported by the component support; a first moving device which includes a motor an which moves the first component holding tool; and a placement section on which the components are placed in a lined up state by the first component holding tool moved by the first moving device. The placement section includes a first recessed section corresponding to a shape of the components, and a second recessed section which having a same shape as the first recessed section rotated by a predetermined angle and which overlaps a portion of the first recessed section. The first component holding tool places the components in both the first recessed section and the second recessed section.