A guidewire (1, 21, 41) for guidance of a catheter or of a catheter introducer sheath into a human patient. The guidewire has, when in untensioned condition, a curved deflection section (2, 22, 42) at its distal end and a shaft (3, 43) with one or more curved steering sections (6, 26, 46, 48) proximal of a straight section (5, 25, 45) proximally neighboring the deflection section. This facilitates steering a guidewire to a predetermined location inside the patient.