To provide an earthquake-resistance reinforcing tool inhibiting the deformation or collapse of a wooden building due to the load of an earthquake.

An earthquake-resistance reinforcing tool body 13 is constituted linealy by inserting one end section of supporting members 14 formed in a pair of cylindrical shapes into each inserting recessed section 16 recessed at both end sections of a load buffer 15 formed of an elastic material in a columnar shape. Connecting sections 19 joined at the other end sections of each supporting member 14 are supported rotatably to each T-shaped sectional mounting member 23. The earthquake-resistance reinforcing tool 11 is installed between a column 12a and a beam 12b, and the load buffer 15 absorbs a part of an elastic deformation by elastically deforming the buffer 15 when load is applied to the column 12a and the beam 12b from the outside so that the reinforcing tool 11 is deflected or twisted by the earthquake. When load is reduced or removed, the reinforcing tool body 13 is returned to an original shape by a return to the original shape of the load buffer 15, and the column 12a and the beam 12b are returned to a usual place.