This study aims to evaluate the effect of an AI-assisted expressive writing intervention on anxiety, emotional distress, and quality of life among patients receiving chemotherapy. A mixed-methods, interventional research design will be employed. Participants will be assigned to either a study group receiving the AI-assisted expressive writing program in addition to routine care or a control group receiving routine care only. Quantitative data will be collected using the Depression Anxiety Stress Scale-21 (DASS-21) and the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30 (EORTC QLQ-C30). Qualitative data will be obtained through semi-structured interviews to explore participants' experiences with the intervention. The findings are expected to provide evidence regarding the effectiveness of AI-assisted expressive writing as a supportive strategy for improving psychological well-being and quality of life among patients undergoing chemotherapy.