The present invention provides an improved magnetic head suspension including a flexure with a flexure wiring structure therein, a load beam constituting a suspension in cooperation with the flexure, and a relay FPC with a flexure wiring structure therein for connection between the flexure and an external wiring structure. A flexure signal line portion has a characteristic impedance matching with that of an FPC signal line portion. A connection portion of the flexure wiring structure has a width substantially equal to that of the FPC signal line portion, and has a length determined by multiplying a positional error in joining between the flexure and the FPC by two and adding the result to the width of the connection portion of the FPC wiring structure. The connection portion of the FPC wiring structure has a width substantially equal to that of the flexure wiring structure, and has a length determined by multiplying the positional error by two and adding the result to the width of the connection portion of the flexure wiring structure. The connection portion of the flexure wiring structure crosses the connection portion of the FPC wiring structure at right angle and is connected thereto.