Hydrate formation conditions of (H-2 + CH4) binary gas mixtures in the presence of tetrahydrofuran (THF) in water were measured in a sapphire cell using the "pressure search" method. The experimental temperature ranged from 277.7 K to 288.4 K, and pressure ranged from 0.12 MPa to 8.86 MPa. The hydrogen composition in the gas mixture varied from 0 mol % to 97.85 mol %. The THF content in the aqueous solution was fixed at 6 mol %.