For the purpose of obtaining a creatinine-specific antibody, a creatinine derivative with 4-aminobutyl, which was served as a linker for preparing the creatinine–bovine serum albumin (BSA) conjugate, was synthesized from 4-benzylaminobutan-1-ol in 8 steps. Production of anti-creatinine antibodies was observed in two rabbits using the creatinine–BSA conjugate, although their titer was rather low.