A method of production of a shaped solid acid which uses a wood starting material to keep down the prime costs, heat treats the synthetic resin binder itself together with the wood starting material to avoid deterioration of the catalyst performance due to coverage by the binder, and thereby realizes a high degree of freedom of design of shape and further a suitable hardness is provided. The method of production of a synthetic resin binder-shaped solid acid comprises a starting material kneading step (S10) of kneading a wood starting material powder M and synthetic resin binder B to obtain a wood starting material mixture, a shaping step (S20) of shaping the wood starting material mixture into predetermined shapes to obtain starting material shapes, a heat treatment step (S30) of heat treating said starting material shapes in an inert atmosphere to obtain heat treated shapes, and a sulfonating step (S40) of introducing sulfo groups into the heat treated shapes to obtain a shaped solid acid.