A dust collector attachment for use with a drilling tool is configured to suck dust generated during the drilling operation. The dust collector attachment includes a suction nozzle and a detection part The suction nozzle has an insertion hole that is configured to allow a tool accessory removably held by the drilling tool to be inserted therethrough, and a suction port through which the dust is sucked. The detection part includes a sensor that is configured to detect metal within a detection range.