A method for inducing programmed cell death in cancer cells and a pharmaceutical composition therefor are provided.Provided is a method for inducing programmed cell death in cancer cells, the method including enhancing production of nitric oxide in cancer cells. Provided is a pharmaceutical composition for inducing programmed cell death in cancer cells, the pharmaceutical composition containing, as an active component, a compound that enhances production of nitric oxide in cancer cells. Provided is use of a compound that enhances production of nitric oxide in cancer cells, in a method for preventing, improving, suppressing progression of, and/or treating cancers.