The present invention provides a curable composition containing an organic polymer having a crosslinkable silicon group, the composition having sufficient usable life and having adhesive properties with respect to an adherend (substrate) that are equivalent to those of the case where aminosilane is included. The composition comprises: (A) a crosslinkable silicon group-containing organic polymer; and (B) a crosslinkable silicon group-containing compound that forms, by means of light, at least one type of amino group selected from the group consisting of primary amino groups and secondary amino groups. The crosslinkable silicon group-containing organic polymer (A) is preferably at least one type selected from the group consisting of crosslinkable silicon group-containing polyoxyalkylene polymers and crosslinkable silicon group-containing (meth)acrylic-based polymers.