Chemotherapy for patients with poor performance status(PS)is not recommended because it increases the risk of death and shortens their survival. We report on 3 cases in which palliative care improved PS and enabled chemotherapy, resulting in a prolonged prognosis. Case 1 involves a 57‒year‒old woman with multiple lung, liver, and bone metastases from breast cancer who was administered celecoxib and oxycodone. She received Mohs paste therapy. Her PS improved from 3 to 2, and paclitaxel and trastuzumab were started; however, the patient died on day 861. Case 2 involves a 53‒year‒old woman with multiple lymph node metastases from carcinoma of an unknown primary cause. She was administered oxycodone, loxoprofen, and dexamethasone. Her PS improved from 4 to 3. The biopsy of her bone marrow showed diffuse large B‒cell lymphoma. The patient is still alive, 6 years and 10 months after the introduction of R‒CHOP. In case 3, a 57‒year‒old man with multiple bone metastases from small cell lung cancer was administered loxoprofen and betamethasone. His PS improved from 4 to 3. Etoposide and carboplatin were administered to him, but the patient died on day 692. Palliative care may enable the introduction of chemotherapy and consequently improve prognosis.