The present invention relates to a Campsis grandiflora extract having an HIV inhibiting activity and to an agent for treating AIDS comprising same as active ingredient. The Campsis grandiflora extract of the present invention is excellent in inhibiting HIV reverse transcriptase activity, protease activity, glucosidase activity, and HIV proliferation, and therefore can be effectively used in treating AIDS, inhibiting the progression of HIV to AIDS, and inhibiting AIDS infection.
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