The present invention provides highly functional platelet production comprising one or more Aryl Hydrocarbon Receptor (AhR) antagonists and one or more ROCK (Rho-associated coiled-coil forming kinase) inhibitors. Provide an accelerator.本発明は、1又は複数の芳香族炭化水素受容体(Aryl Hydrocarbon Receptor; AhR)アンタゴニストと1又は複数のROCK(Rho-associated coiled-coil forming kinase)阻害剤とを含む、機能性の高い血小板産生促進剤を提供する。