Primer composition for inorganic oxide cured product, and multilayer body

A primer composition for inorganic oxide comprising:

• a polysiloxane compound (A);
• a compound having a reactive group (B) that is not the polysiloxane compound (A);
• and
• inorganic oxide fine particles (C),
• the polysiloxane compound (A) having a vinyl group and/or an epoxy group, a structural unit represented by a general formula (1) and/or a general formula (2), and a silanol group and/or a hydrolyzable silyl group, wherein
• a content of the polysiloxane compound (A) is 2.5 to 40 mass % relative to a sum of the polysiloxane compound (A), the compound (B), and the inorganic oxide fine particles (C),
• in the general formulae (1) and (2), R1, R2, and R3 are each independently a group having a polymerizable double bond selected from the group consisting of —R4—CH═CH2, —R4—C(CH3)═CH2, —R4—O—CO—C(CH3)═CH2, —R4—O—CO—CH═CH2, and a group represented by a general formula (3) below, or an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, an aryl group, an aralkyl group having 7 to 12 carbon atoms, or an epoxy group, and each R4 is independently a single bond or an alkylene group having 1 to 6 carbon atoms,
• in the general formula (3), n is an integer of 1 to 5, a structure Q is —CH═CH2 or —C(CH3)═CH2, and R4 is same as described above.