A scribing apparatus for forming a scribe line on a surface of a work comprises a scribe body provided with an abutment member having a sharpened tip and a vibration generating device for applying a vibration to the abutment member, a support member for supporting the scribe body to be movable in a direction crossing the surface of the work, and an impact applying device for applying an impact to the scribe body. The impact applying device comprises an air-cylinder assembly supported by the support member, the air-cylinder assembly having a rod having an end portion to be brought into contact with the scribe body to thereby apply the impact to the abutment member.