A protector for installation on a floor includes: a guard part comprising a contact surface portion having first screw through-holes formed therethrough, a middle portion which is coupled upward from the edge of the contact surface portion to be primarily impacted, and wing portions integrally coupled to both sides of the middle portion, respectively; a base part having third screw through-holes formed therethrough so as to be fixed to a floor surface while being brought into contact with the floor surface; an intermediate body disposed between the guard part and the base part and having second screw through-holes formed therethrough; and stud bolts passing through the guard part, the intermediate body, and the base part so as to fix the base part to the floor surface, wherein when an external force is applied, the elastic and flexible intermediate body is compressed in a collision direction to effectively reduce the impact.