To provide a floor face with protruded parts and the laying method thereof and detect the floor face with protruded parts by a magnetic sensor.

A floor face with protruded parts is obtained by sticking the protrusions on the floor face by use of a cold-setting acrylic resin. The cold- setting acrylic resin contains signal functional (meth)acrylate, multi-functional (meth)acrylate, an initiator of polymerization, and an accelerator of decomposition. The floor face with protrusions is provided with magnetism by addition of magnetic powdered materials into a cold-setting acrylic resin. The protrusions can be easily and rapidly connected to a wet, dry, or oily floor face by use of the acrylic cold-setting resin.