A semiconductor device including: a semiconductor layer including an active region and an isolation region provided around the active region; an element formed in the active region; an interlayer dielectric formed above the semiconductor layer; and an electrode pad formed above the interlayer dielectric and having a rectangular planar shape having a short side and a long side, the electrode pad at least partially covering the element when viewed from a top side, and the semiconductor layer positioned in a specific range outward from a line extending vertically downward from the short side of the electrode pad being a forbidden region.