The invention relates to a floor drain device of a shower room. The floor drain device comprises a circular floor drain body (1). A floor drain cover (2) and a filter net (3) are sequentially arranged inside the floor drain body (1) from top to down. The filter net (3) comprises a plane portion (3-1) and a vertical piece (3-2) perpendicular to the plane portion (3-1). A groove (1-1) matched with the vertical piece (3-2) is formed in the floor drain body (1). The vertical piece (3-2) is inserted into the groove (1-1) and drives the filter net (3) to rotate inside the floor drain body (1). A circular protruding block (3-4) is arranged in the center of the plane portion (3-1). The floor drain device can effectively obstruct bad smell and hazardous gas in a sewer from spilling out along a pipeline, and the phenomenon that dirt blocks the sewer can be effectively avoided; in addition, after sand in the pipeline is sedimented, stirring can be performed through a stirring stick, wastewater can flow out conveniently, and the floor drain device is convenient to use and practical.