An absorbent article for use with a RF reader includes an absorbent pad and a RFID tag. The absorbent pad includes a lining layer, a liquid-impermeable layer, an absorbent layer, and a plurality of sensing wires. The liquid-impermeable layer is attached to the lining layer. The absorbent layer is disposed between the lining layer and the liquid-impermeable layer. The lining layer and the liquid--impermeable layer define a receiving space having an opening located at a side portion of the absorbent pad. The sensing wires are provided on the absorbent layer and extend into the receiving space. The RFID tag is received in the receiving space and contacts electrically the sensing wires when received in the receiving space.
