Improvements in the vertical magnetic recording/reproducing head of the type in which a main magnetic pole and an auxiliary magnetic pole are arranged as a unitary structure on one side of a magnetic recording medium. Problems are solved in relation to false pulses in the output signals and change in the level, contributing to improving the sensitivity for recording and reproduction. The magnetic head is used for vertical VTR's. The vertical magnetic recording/reproducing head of the invention comprises a support block which consists of a main magnetic pole, a nonmagnetic block which holds said main magnetic pole to form a surface opposed to the magnetic recording medium, and an auxiliary magnetic pole block which supports part of said main magnetic pole and which supports said nonmagnetic block; and a magnetic block provided on the side surface of said support block in the direction of track width. The region opposed to the magnetic recording medium is constituted by the main magnetic pole, nonmagnetic block and magnetic block.