An object of the present invention is to provide a straddle-type monorail branching device that does not require a control device for synchronous control of an electric motor that changes a branching girder and can reduce periodic maintenance and inspection work. A plurality of branches connected in series in the longitudinal direction, movable to switch the course between the fixed end side fixed beam (1) and the plurality of movable end side fixed beams (2a, 2b, 2c, 2d, 2e) Girder (3a, 3b, 3c, 3d, 3e), electric motor (6) provided at the lower part of branch girder (3e), connecting shaft (11) for transmitting rotational force from electric motor (6), and connecting shaft A joint (12) coupled to (11) and a conversion device (5a, 5b, 5c, 5d) that moves the branch beam (3a, 3b, 3c, 3d, 3e) by the rotational force transmitted from the electric motor (6). 5e) and a joint support portion (13) that is provided at a lower portion near the longitudinal center of the branch beam (3c) and supports the vertical position of the joint (12).
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