Form measuring sensor and form measuring instrument

A form measuring sensor, comprising:

• a stylus having a contact portion to be in contact with a workpiece surface at a first end;
• a body for holding the stylus through an adaptor, the adaptor including a stylus attachment for a second end of the stylus to be attached, a body attachment to be attached to the body and an elastically deformable connector for connecting the stylus attachment and the body attachment, the connector elastically deforming to allow a displacement of the stylus and the stylus attachment relative to the body attachment in accordance with a configuration of the surface of the workpiece;
• and
• a deformation sensor disposed to detect the elastic deformation of the connector, wherein the stylus is formed in approximate L-shape and includes a first arm extending along the surface of the workpiece with an end attached to the stylus attachment, and a second arm extending substantially orthogonal with the other end of the first arm and having the contact portion at an end thereof,
• wherein the body is relatively moved along the surface of the workpiece while the contact portion of the stylus keeps in contact with the surface of the workpiece, and
• wherein the contact portion of the stylus and the connector are disposed on an identical line approximately parallel to the relative movement direction.