Abstract: A self-feeding paint brush of the type comprising a housing, an upper deck, a paint container, a transmission mechanism and a brush assembly, wherein a control switch is made on the brush assembly to turn on a motor to drive a gear set to operate via a pinion and a driving gear, causing a suction chamber to suck up oil paint from the paint container into a guide tube via two ducts, for further distribution over the bristles of the brush assembly through a nozzle tube. The housing is releasably secured to the paint container at the top by a hook-and-ring connection to facilitate oil paint filling operation.