The present invention relates to a bubbling plug to be installed on the bottom of the ladle, and more particularly, long-term use without replacing the bubbling plug by allowing the molten portion to be automatically dropped when the gas passage is blocked or narrowed while the fuzzing block is damaged during use. This relates to a bubbling plug that is capable and always ensures a normal opening rate.;The present invention provides a bubbling plug having a purging block made of porous refractory and a seating block formed on the outer circumferential surface of the purging block to be detachably attached to the bottom of the ladle.;The purging blocks are stacked in multiple stages up and down as a cone of upper and lower light,;The boundary portion of each purging block is configured to be cut while the transverse crack progresses when the internal pressure that increases as the melting of the upper purging block proceeds is higher than the pressure when the melting portion is dropped.;Bubbling, Plug, Fuzzing Block, Yongson, Dropout, Ladle
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