[en] The real and imaginary parts of the magnetic susceptibility chi' and chi were measured for potassium graphite intercalation compounds with various ratios of K to C content (C₈₀K-C₉sub(.)₄K) prepared with HOPG. The transition temperature to the superconducting state, Tsub(c), was about 152 mK, and independent of K concentration. C₈₀K and C₈₁K were found to be of type 1 for H perpendicular to the c plane of type 2 for H parallel to the c plane, while C₉sub(.)₄K was found to be of type 1 in the both directions of H, Hsub(c) and Hsub(c)₂ decreased with the K concentration. Hsub(c) and Hsub(c)₂ perpendicular to the c plane versus T curves had slightly positive curvatures in stoichiometric, and negative ones in less contained K compounds. The behaviour related to the dimensionality above Tsub(c) is also discussed, taking into account the suspectibility fluctuation, and the two-dimensional behaviour was found at temperature very close to Tsub(c). (orig.)