**Study Summary:** This study looks at how well a treatment called **repetitive transcranial magnetic stimulation (rTMS)** works for improving depression in people with **Parkinson's Disease (PD)**. rTMS is a procedure where magnetic fields are used to stimulate certain parts of the brain. Participants in the study will be placed in one of two groups by chance: one group will receive the real rTMS treatment, while the other group will receive a fake (sham) treatment. The study will also use technology like **neuronavigation systems** to guide treatment and evaluate responses using digital tools, such as observing changes in facial expressions and eye movements. Key Points: - Participants must be between ages 40-90, have Parkinson's with mild to moderate depression, and be on stable medication. - The study involves advanced technology and testing, but there is no mention of compensation. - People with certain health issues, like epilepsy or heart disease, cannot participate. **Eligibility:** You must be able to read and write Korean and complete questionnaires independently. Participants cannot have other major health problems or be pregnant.