[Problem] To provide a paste composition which has appropriate viscosity and is excellent in both of coating property and calcining property, a production process for a calcined body using the paste composition, and a calcined body. [Solution] A paste composition characterized by comprising a (meth)acrylic (co)polymer containing 20 to 100% by mol of a constituent unit (A) represented by the following general formula (1) is provided. In the general formula (1), R 1 is a hydrogen atom or a methyl group, R 2 is a group having diameters of X<13.5 Å and Y>6. 15 Å (here, X represents a length in the long-side direction and Y represents a length in the short-side direction) and having a volume larger than 80 Å 3 and is a functional group having hydrogen bond property, a group having an alkoxy group or a group having an aryloxy group, and n is a number of 5 to 2000.