Manufacturing method of honeycomb structure

A manufacturing method of a honeycomb structure, comprising:

• a step of mixing a coarse particle zeolite having a large average particle diameter, a fine particle zeolite having an average particle diameter smaller than that of the coarse particle zeolite, and a raw material of an inorganic bonding material to prepare a zeolite raw material;
• a step of forming the prepared zeolite raw material into a honeycomb shape to prepare a honeycomb formed body;
• and
• a step of firing the prepared honeycomb formed body to prepare the honeycomb structure,
• wherein in the step of preparing the zeolite raw material,
• as the coarse particle zeolite, a chabazite type zeolite is used in which an average particle diameter is 2 μm or more and 6μm or less,
• the fine particle zeolite is used in which an average particle diameter is 0.02 μm or more and smaller than 2 μm,
• the raw material of the inorganic bonding material which includes at least basic aluminum lactate is used, and
• 10 to 35 parts by mass of the basic aluminum lactate as the raw material of the inorganic bonding material is added to 100 parts by mass of a total mass of the coarse particle zeolite and the fine particle zeolite, to prepare the zeolite raw material.