Parkinson's disease (PD) studies often measure daily motor function with paper diaries resulting in issues of compliance and reliability. The feasibility and compliance of PD patients using electronic diaries were examined. Twelve patients completed diaries for 7 consecutive days. Diaries recorded motor function, time and date of each half-hour entry and had an alarm as notification of missed entries. Entry compliance was 99.98% within 24h and average response time during awake hours was 63 min. Electronic diaries could be operated by PD patients, provided valuable information about response patterns and resulted in average response compliance of approximately 1h.