A method of making an insole includes the steps of (a) providing a base sheet material having through holes, (b) immersing the base sheet material in a filling material for enabling the filling material to fill up the through holes, (c) baking the base sheet material to cure the filling material, (d) splitting the base sheet material to a desired thickness, (e) bonding a fabric layer to one side of the base sheet material, (f) cutting the base sheet material into semi-finished insole, (g) stamping the semi-finished insole into a finished insole where the filling material protrudes over the top and bottom sides of the base sheet material, and the fabric layer has raised portions supported on the protruded filling material corresponding to the through holes.