Shedding device in loom and gaiting method in loom equipped with the shedding device

In a shedding device (19) included in a loom (1) that performs a weaving operation using warp threads (PT, GT) let off from at least two warp beams (2, 3), controlling means (19a) is provided for electrically controlling individual movements of a plurality of heald frames (HF). The shedding device (19) is characterized by including a standby-frame setting unit (30) having set therein standby information on specific heald frames of the plurality of heald frames (HF), the specific heald frames including heald frames that correspond to the warp threads let off from one of the at least two warp beams (2, 3). The standby information is used for setting the specific heald frames in a standby state for a predetermined period. The standby-frame setting unit (30) is connected to the controlling means (19a).