Method for producing a hydrogen detection sensor, and resulting sensor (PCT/ES2014/000157) The invention relates to a method for producing a visual hydrogen sensor and to a sensor produced in this manner, said sensor allowing the presence of hydrogen gas in a medium to be detected by the naked eye as a result of a change of colour in the sensor. The method involves the deposition of thin porous layers of oxides that do not absorb visible light in their completely oxidised state and which become coloured when they are partially reduced. The deposition step is carried out using vapour phase deposition (VPD) in a glancing angle configuration (GLAD). The method also involves: the preparation of a solution of an active metal precursor, capable of dissociating the hydrogen molecule, and a carrier vector; and the deposition of said solution on the oxide layer in order to incorporate a minimum quantity of active metal within the pores of the oxide layer in the form of nanoparticles.