To provide a magnetic head in which impedance between substrates grounded through an element part, a bleed resistance electric terminal, and an upper and lower shield common electrode can be adjusted easily, and its manufacturing method, a head suspension assembly, and a magnetic recording device.

In the magnetic head in which a CPP magneto-resistance effect element, a pair of electrodes 9, 10, a pair of first conduction lines 11, 12 connecting electrically the pair of electrodes and a detecting circuit device, and a pair of second conduction lines 13 for discharging static electricity by connecting electrically the pair of first conduction lines and a substrate 15 are arranged and constituted, a grounded electric shield layer 16 is arranged between the first or the second conduction line and the substrate 15, capacitance between them is adjusted, impedance between substrates grounded through the element part 1, the bleed resistance electric terminal 16, and the upper and lower magnetic shield common electrodes 9, 10 can be balanced at plus/minus terminals.