We have prepared the chiral main-chain LC homopolymer and copolymers which are constructed from the p,p’-biphenyldicarboxylic acid as a mesogen component and a certain mixture of chiral (S)-2-methylbutanediol and hexanediol as spacer components. These polymers exhibit polymorphism including the chiral nematic, smectic A, and chiral smectic C phases. We have examined the transition behavior between these mesophases and also described the mesophase structure and properties, especially focusing on the ferroelectric chiral smectic C phase.