To provide a new fixing base for equipment, which is not rotated even if a large load is applied to one base member and the other base member as well as a rotating force is applied to the one base member and the other base member, without the need for enhancing the strength of the one base member and the other base member in order to prevent the rotation of the one base member and the other base member.

A fixing base for equipment includes: one base member 2 and the other base member 3 which are disposed in parallel to each other and on which rails are formed respectively, the equipment being fixed on the rails; and one plate 21 and the other plate 22 for damming up concrete C placed between the one base member 2 and the other base member 3. Protrusion members 31 to 34 protruding toward the one base member 2 side or the other base member 3 side are disposed on respective opposite surfaces 2a, 3a formed on the one base member 2 and the other base member 3.