There is provided a novel organic silicon compound that can be used for a silane coupling agent. An organic silicon compound of Formula (1):(where A− is Formula (2) or Formula (3):E is Formula (4) or Formula (5):R1 and R2 are each independently a C1-5 alkyl group, R3 is a hydrogen atom or a methyl group, R4 and R5 are each independently a C1-5 alkyl group, m, n, and p are each independently an integer of 1 to 5, and q is an integer of 1 to 3).