A chemically amplified negative resist composition comprising a silicone structure-bearing polymer comprising recurring units of the general formula and having a weight average molecular weight of 3,000 to 500,000, wherein R 4 to R 7 are each independently a monovalent C 1 -C 8 hydrocarbon group, m is an integer of 1 to 100, a, b, c and d each are 0 or a positive number, with the proviso that a, b, c and d are not equal to 0 at the same time, and a+b+c+d = 1, X is a divalent organic group of the general formula: wherein Z is a divalent organic group selected from the following: - CH 2 -, n is 0 or 1, R 8 and R 9 are each independently C 1 -C 4 alkyl or alkoxy, and k is 0, 1, or 2, and Y is a divalent organic group of the general formula: wherein V is a divalent organic group selected from the following: - CH 2 -, p is 0 or 1, R 10 and R 11 are each independently C1-C4 alkyl or alkoxy, and h is 0, 1, or 2, and at least one crosslinker selected from the group consisting of an amino condensate modified with formaldehyde or formaldehyde-alcohol, a phenol compound having on the average at least two methylol or alkoxymethylol groups in the molecule, and a polyhydric phenol compound having a hydroxyl group substituted by a glycidoxy group, a photoacid generator which is decomposed to generate an acid upon exposure to light of wavelength 190 to 500 nm, a solvent, and an isocyanuric acid of the structure having the general formula: wherein R 1, R 2 and R 3 may be the same or different, at least one of R 1, R 2 and R 3 is a crosslinking group or a monovalent organic group having a reaction site susceptible to crosslinking reaction and the remaining is a monovalent hydrocarbon group of 1 to 20 carbon atoms. a silicone structure-bearing polymer comprising recurring units of the general formula and having a weight average molecular weight of 3,000 to 500,000, wherein R 4 to R 7 are each independently a monovalent C 1 -C 8 hydrocarbon group, m is an integer of 1 to 100, a, b, c and d each are 0 or a positive number, with the proviso that a, b, c and d are not equal to 0 at the same time, and a+b+c+d = 1, X is a divalent organic group of the general formula: wherein Z is a divalent organic group selected from the following: - CH 2 -, n is 0 or 1, R 8 and R 9 are each independently C 1 -C 4 alkyl or alkoxy, and k is 0, 1, or 2, and Y is a divalent organic group of the general formula: wherein V is a divalent organic group selected from the following: - CH 2 -, p is 0 or 1, R 10 and R 11 are each independently C1-C4 alkyl or alkoxy, and h is 0, 1, or 2, and wherein R 4 to R 7 are each independently a monovalent C 1 -C 8 hydrocarbon group, m is an integer of 1 to 100, a, b, c and d each are 0 or a positive number, with the proviso that a, b, c and d are not equal to 0 at the same time, and a+b+c+d = 1, X is a divalent organic group of the general formula: wherein Z is a divalent organic group selected from the following: - CH 2 -, n is 0 or 1, R 8 and R 9 are each independently C 1 -C 4 alkyl or alkoxy, and k is 0, 1, or 2, and - CH 2 -, Y is a divalent organic group of the general formula: wherein V is a divalent organic group selected from the following: - CH 2 -, p is 0 or 1, R 10 and R 11 are each independently C1-C4 alkyl or alkoxy, and h is 0, 1, or 2, and - CH 2 -, at least one crosslinker selected from the group consisting of an amino condensate modified with formaldehyde or formaldehyde-alcohol, a phenol compound having on the average at least two methylol or alkoxymethylol groups in the molecule, and a polyhydric phenol compound having a hydroxyl group substituted by a glycidoxy group, a photoacid generator which is decomposed to generate an acid upon exposure to light of wavelength 190 to 500 nm, a solvent, and an isocyanuric acid of the structure having the general formula: wherein R 1, R 2 and R 3 may be the same or different, at least one of R 1, R 2 and R 3 is a crosslinking group or a monovalent organic group having a reaction site susceptible to crosslinking reaction and the remaining is a monovalent hydrocarbon group of 1 to 20 carbon atoms.