PURPOSE: To constitute a hybrid without using DC stopping parts such as special DC cutting-off capacitors, by using coupling parallel lines as distribution constant lines constituting the hybrid.

CONSTITUTION: The hydrid consists of distribution constant line l1' connected between input terminals I1 and I2, and the 1st output terminals O1 and O2, the series circuit of distribution constant lines l2 and l3 connected between input terminal I1 and I2, and the 2nd output terminals P1 and P2, and distribution constant line l4 connected between the 1st output terminal O1 and the 2nd output terminals P1 and P2. Since distribution constant lines l1' and l3' include coupling parallel lines composed of parallel conductors a1 and a2, and b1 and b2, DC cutting-off comes into effect between input terminal I1 and output terminals O1 and P1 and even when active elements connected to output terminals O1 and O2, and P1 and P2 and applied with a DC voltage, the DC voltage is cut off at input terminal, I1 and I2.