To provide a polyketone having excellent mechanical and thermal characteristics, and high thermal stability, and suitable for melt molding processing; and to provide a method for producing the polyketone.

The polyketone comprising a copolymer of an ethylenically unsaturated compound and carbon monoxide contains a structure represented by chemical formula (1) [wherein, R1 is an atomic group constituted of at least one element selected from hydrogen, a typical element, a halogen element, Si, P and S; X1 is a reactive group or an atomic group having a reactive group and constituted of at least one element selected from hydrogen, a typical element, a halogen element, Si, P and S; and Y1 is a silicon element-containing group such as a group represented by chemical formula (2)], and has ≥0.01 and ≤20 dl/g intrinsic viscosity.