Disclosed is a method for manufacturing an infrared sensor (1) which comprises a step for preparing a base (20) wherein a plurality of supporting sections (22a, 22b) composed of a material having low thermal conductivity and a first electrode (23a) are integrally formed on one major surface, a step for preparing a pyroelectric element (10) wherein a second electrode (12a) to be electrically connected with the first electrode (23a) is formed on one major surface, a step for placing a certain amount of a conductive paste (24a) on the surface of the first electrode (23a) so that the height of the placed paste is higher than the supporting sections (22a, 22b), and a step for mounting the pyroelectric element (10) on the upper surface of the supporting sections (22a, 22b) in such a manner thatthe second electrode (12a) is in contact with the conductive paste (24a) and then curing the conductive paste (24a).