Disclosed is an infant mobile tooth-brushing basin. The infant mobile tooth-brushing basin includes a water supply container and water collecting container received in a main body, a pumping device installed to the top of the main body to pump water in the water supply container, a drain bowl indented in an upper surface of the main body and connected to the water collecting container in which water used upon tooth-brushing is collected, a funnel connected to the main body via a flexible pipe that is connected to the water collecting container, a tool receiving recess and a storage case to receive a toothbrush and toothpaste, and gargle cups. The infant mobile tooth-brushing basin allows infants to brush their teeth alone without assistance of a guardian regardless of a place and assists in forming a tooth-brushing habit by arousing curiosity and interest of infants.