The present invention relates to a pharmaceutical composition for preventing or treating diseases related to abnormal proliferation of cells, comprising a cytoplasmic heat shock protein (Hsp)60 kDa inhibitor as an active ingredient, and to a screening method and a kit using the composition. According to the present invention, substances which inhibit expression of cytoplasmic Hsp 60 genes or inhibit activity of cytoplasmic Hsp 60 or inhibit binding between cytoplasmic Hsp 60 and IKK protein prevent interaction between cytoplasmic Hsp 60 and IKK complexes to make NF-κB path inactive, and thus induce apoptosis. Therefore, the substances can be valuably used in preventing or treating diseases related to abnormal proliferation of cells, such as cancer, inflammatory diseases or hyperproliferative vascular diseases.
