A curable composition capable of forming or repairing a partition wall having a good ink repellency on the top surface and a good ink affinity on the side surface by applying a micro discharge method, and formed using such a composition. Provided is a partition wall that has been repaired or repaired, a method of manufacturing or repairing the partition wall using such a composition, and an optical element including such a partition wall. A curable composition for forming a partition wall having a top surface formed in a shape for partitioning a substrate surface into a plurality of dot forming sections and a side surface subsequent thereto, or for repairing defects generated in the partition wall, and having liquid repellency A curable composition for partition walls such as an organic EL device comprising a compound (A), a crosslinking agent (B), and a polymerization initiator (C), wherein the liquid repellent compound is lyophilic by light irradiation. And a partition wall formed or repaired using the composition, a method of manufacturing or repairing the partition wall using the composition, and an optical element such as an organic EL element having the partition wall.
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