A support device includes a platform, a connecting rod connected with the platform, a main support unit connected with the connecting rod, a weight member connected with the main support unit, two opposite clamping boards each pivotally mounted on the weight member, a swivel mechanism swivelably mounted between the connecting rod and the main support unit, a pivot member pivotally mounted on the swivel mechanism, and an auxiliary support unit connected with the pivot member. Thus, the video camera support device can be operated in two different manners to facilitate a user carrying the video camera. In addition, when the platform is moved by the user, the platform is kept at a horizontal state by provision of the weight member and the clamping boards so that the video camera is moved solidly and stably.