A ceramic honeycomb filter comprises a ceramic honeycomb structure having porous partition walls (11b) defining a plurality of flow paths (11c) for flowing an exhaust gas through said porous partition walls to remove particulates from said exhaust gas, predetermined flow paths among said flow paths being sealed at their ends, flow paths near its outer peripheral wall being sealed by sealers (12a, 12b) at both ends, the length of said sealers from a filter end surface being 8.2% or less of the total length of said filter, and said flow paths having both ends sealed existing within a range of a radial length corresponding to 5 times the partition wall pitch at maximum from the outer periphery toward the center of said filter.