To provide an epoch-making bar supporting device having an extremely high commercial value.

This bar supporting device for supporting a bar 2 installed laterally on a roof part 1 includes a lower body 3 having an installation part 3A installed on the roof part 1 and a vertical installation part 3B installed on the upper part of the installation part 3A, and an upper body 4 having a bar receiving part 4A for receiving the bar 2 and a vertical installation part 4B installed on the lower part of the bar accepting part 4A. The vertical installation part 3B and the vertical installation part 4B are fitted to each other and arranged continuously with each other.