A electrostatic protection element (101) includes: a substrate (1) of a first conductivity type; a first low-concentration diffusion region (2) of a second conductivity type and a second low-concentration diffusion region (3) of the first conductivity type which are formed on said substrate (1), the second conductivity type being different from the first conductivity type; a first high-concentration diffusion region (4) of the second conductivity type and a second high-concentration diffusion region (5) of the first conductivity type which are (i) formed in said first low-concentration diffusion region (2), and (ii) electrically connected with each other; a third high-concentration diffusion region (9) of the first conductivity type and a fourth high-concentration diffusion region (8) of the second conductivity type which are (i) formed in said second low-concentration diffusion region (3), and (ii) electrically connected with each other; a fifth high-concentration diffusion region (6) of the first conductivity type formed in said first low-concentration diffusion region (2); and a sixth high-concentration diffusion region (7) of the second conductivity type formed in said second low-concentration diffusion region (3). The fifth high-concentration diffusion region (6) and the sixth high-concentration diffusion region (7) are electrically connected with each other.