The present invention relates to a pharmaceutical composition for the prevention and treatment of inflammatory diseases comprising The present invention relates to a pharmaceutical composition for the prevention and treatment of inflammatory diseases comprising Trachelospermi caulis extract as an active ingredient. More particularly, the pharmaceutical composition of the present invention is characterized in that it is standardized and formulated so that the arctiin is contained in the Trachelospermi caulis extract within a predetermined range to exhibit excellent inhibitory effects on pains, acute inflammation, acute edema, production of iNOS, and TNF-Ya, activation of the enzymes of MAP kinases and NFY B, thus effective in the prevention and treatment of inflammatory diseases such as arthritis.