[Object]The present invention provides an active device in which the misalignment of a partition relative to electrodes is reduced and a method for manufacturing an active device.[Solution]An active device according to the present invention includes a substrate 2, a first electrode 5 and a second electrode 6 formed adjacent to each other on one main surface of the substrate 2, an organic semiconductor layer 9 formed on the one main surface of the substrate 2 at least over a region between the first electrode 5 and the second electrode 6, and a partition 12 formed on the one main surface of the substrate 2 in a region that is located outside the organic semiconductor layer 9 in a planar direction and that is different from regions where the first electrode 5 and the second electrode 6 are formed. The partition 12 is formed of a conductive material.