The interactions of polyethylene glycol (PEG) with some solvents were studied by inverse gas chromatography with surface-treated porous silica as the support material. The retention volume of solvent probe was determined after considering its dependence on the coverage of PEG on the support. The interaction parameters so far obtained were found to be in good accordance with the literature data from static measurements and reflect some characteristic points of the interactions between PEG and solvents.