Provided is a curable composition that is rapidly cured to form a cured product which inhibits yellowing over a long period of time even in a high temperature environment, which maintains excellent transparency, and which can be advantageously used in a wafer level lens. This curable composition is characterized by containing (A) an alicylic epoxy compound represented by formula (1), (B) a siloxane compound having 2 or more glycidyl groups in the molecule and (C) a curing agent. In the formula, X is a single bond or a linking group.
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