The adsorption isotherms of supercritical hydrogen on [Cu-2(bz)(4)(pyz)](n) were measured at 77 K up to 10 MPa. The amount of supercritical hydrogen adsorbed on [Cu-2(bz)(4)(pyz)](n) at 77 K was 1.4 wt % at 10 MPa. The adsorption isotherms of supercritical hydrogen on [Cu-2(bz)(4)(pyz)](n) showed a stepwise adsorption that suggests clathrate formation between [Cu-2(bz)(4)(pyz)](n) and hydrogen molecules. The adsorption isotherms of supercritical hydrogen on [Cu-2(bz)(4)(pyz)](n) were measured at 77 K up to 10 MPa. The amount of supercritical hydrogen adsorbed on [Cu-2(bz)(4)(pyz)](n) at 77 K was 1.4 wt % at 10 MPa. The adsorption isotherms of supercritical hydrogen on [Cu-2(bz)(4)(pyz)](n) showed a stepwise adsorption that suggests clathrate formation between [Cu-2(bz)(4)(pyz)](n) and hydrogen molecules.