There is provided a manufacturing method of a protective-component-provided workpiece. The manufacturing method of a protective-component-provided workpiece includes a step of dissolving a thermoplastic resin whose solubility parameter is equal to or higher than 8.5, in a liquid ultraviolet-curable resin, to prepare a liquid mixed resin, a step of supplying the mixed resin to a support surface of a support table to form a resin layer with a predetermined thickness, a step of irradiating the resin layer with ultraviolet rays and curing the resin layer to form a protective component with a sheet shape, and a step of heating the sheet-shaped protective component before or after one surface of the sheet-shaped protective component and one surface of the workpiece are brought into close contact with each other, and causing the sheet-shaped protective component to come into close contact with the workpiece and integrate with the workpiece.