there are disclosed a thermosetting resin composition for a powder paint in which a resin composition component is a copolymer obtained by allowing a vinyl - based polymer g block ) to graft - react with a vinyl - based polymer s block ), and if the solubility parameters of the components and are represented by sp g and sp g , respectively , sp g and sp s satisfy the following numerical formula , and a thermosetting powder paint composition comprising a resin composition component and a hardener composition component wherein the component is said thermosetting resin composition for a powder paint . by these compositions , a thermosetting powder paint composition having excellent storage stabilities , appearance properties , physical properties and chemical properties can be provided . particularly , there can be provided a thermosetting powder paint composition suitably applied to painting of bodies of vehicles such as automobiles and parts of vehicles such as automobiles , particularly , to top painting . sp g & lt ; sp s