To provide The present invention relates to novel organic silicon compounds that can be used in the silane coupling agent . A following formula (1): (In the formula, A- following formula (2) or formula (3): ## STR2 ## represents, E is the following formula (4) or (5 ): [Formula 3] represent, each independently of R1 and R2 represents an alkyl group having a carbon number of 1 to 5, R3 represents a hydrogen atom or a methyl group, having 1 to carbon atoms in each of R4 and R5 independently represents a 5 alkyl, m, n and p represent each independently an integer of 1 to 5, q is an organic silicon compound represented by the representative.) an integer of 1 to 3. .BACKGROUND【課題】シランカップリング剤に使用できる新規な有機ケイ素化合物を提供する。【解決手段】下記式(1):【化1】(式中、A-は下記式(2)又は式(3):【化2】を表し、Eは下記式(4)又は式(5):【化3】を表し、R1及びR2はそれぞれ独立に炭素原子数1乃至5のアルキル基を表し、R3は水素原子又はメチル基を表し、R4及びR5はそれぞれ独立に炭素原子数1乃至5のアルキル基を表し、m、n及びpはそれぞれ独立に1乃至5の整数を表し、qは1乃至3の整数を表す。)で表される有機ケイ素化合物。【選択図】なし