<p>A method of producing a honeycomb segment joint body, in which deterioration in strength characteristics of the joint body is prevented from occurring, the deteriorating being due to nonuniformity of the structure of joining material layers that are formed of a joining material and are present between honeycomb segments integrally joined together by the joining material layers. Honeycomb segments (10), each having cells partitioned by partition walls and penetrating in the axial direction of the segment, are integrally joined by the joining material at their joining surfaces and dried to form a small block. Small blocks (13) are integrally joined together or a single layer of a honeycomb segment (10) is integrally joined to the outer peripheral surface of a small block (13).</p>
