A wiper apparatus having an integrally formed washer nozzle may include a retainer connected to a driving motor to be rotated, a wiper blade having a center spoiler and side spoilers, a washer module coupled to an upper surface of the center spoiler, a rubber coupled to a lower surface of the wiper blade, and a connector for detachably fastening the wiper blade and the retainer, wherein the connector may be inserted into a connector hole formed on an upper surface of the washer module and may be coupled into recesses of the center spoiler using bosses formed at an inner side thereof, and the retainer may be inserted into opposite insertion holes of the connector through a tip end thereof to be laid on an upper surface of the connector and to be caught by opposite hook coupling parts of the connector through hooks at lower portions thereof.