Aim The present study investigated the effectiveness of Baduanjin Qigong on symptoms related to gait, functional mobility and sleep in Parkinson disease (PD) patients. Methods A total of 100 patients (age 67.53 ± 8.56 years, range 55–80 years) with mild to moderate PD were randomly assigned to two groups. Participants in the Baduanjin Qigong group (BQG) received a Baduanjin Qigong program, consisting of four 45‐min sessions each week and daily walking 30 min for 6 months. Participants in the control group were carried out daily walking for 30 min. Pre‐ and post‐intervention testing was carried out to assess sleep quality, fatigue, functional mobility and gait performance in these participants. Results After the 6‐month Baduanjin Qigong intervention, the BQG showed sleep quality improvements in the Unified Parkinson's Disease Rating Scale score (P = 0.049), Parkinson's Disease Sleep Scale‐2 (PDSS‐2) total score (P = 0.039), Motor Symptoms at Night (PDSS‐2) score (P = 0.039), PD Symptoms at Night (PDSS‐2) score (P = 0.029), Disturbed Sleep (PDSS‐2) score (P = 0.037). The BQG showing functional mobility capacity greater improvements in the Berg Balance Scale (P = 0.041) and 6‐minute walk test (P = 0.042), and greater decrease in the Timed Up & Go (s; P = 0.046). The BQG showing gait function increased in the gait speed (m/s; P = 0.011). However, this was not the case for the control group, which remained at the same level as pretest performance. Conclusions BQG improved the gait performance, functional mobility and sleep quality in older adults with PD at the 6‐month follow up. It is as an alternative home exercise program for older adults in rehabilitation for PD. Geriatr Gerontol Int 2016; 16: 911–919.