FIG. 1 is a perspective view of a floor panel for a clean room showing my new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a left side view thereof; FIG. 5 is a right side view thereof; FIG. 6 is a top view thereof; FIG. 7 is a bottom view thereof; FIG. 8 is a rear perspective reference view indicating sectional line 9-9; and, FIG. 9 is a cross sectional view taken along line 9-9 of FIG. 8.