Here, we show that quercetin inhibits HGF/c-Met signaling manifested by suppressing c-Met phosphorylation, interfering c-Met dimerization, reducing c-Met protein expression and attenuating the activities of downstream molecules including Gab1, FAK and PAK, which contributes to the anti-metastatic action of quercetin in melanoma. The gene discussed is PTK2; the disease is melanoma.