During this year, I have studied the feature of the active region filaments. Using two different observations which are H-alpha fibrils and EUV threads, we have determined filament chirality. We found clear hemispheric pattern. Namely, filaments in the northern (southern) hemisphere have dextral (sinistral) fibrils in H-alpha observations obtained from the Big Bear Solar Observatory. On the other hand, negative (positive) closings of filament threads in EUV images observed with TRACE appear in the northern (southern) hemisphere, respectively. These indicate that positive (negative) chirality filaments are surrounded by sinistral (dextral) fibrils. Since fibrils and EUV threads are along magnetic field lines, we suggest that filament and surrounding feature have a same helicity sign.<br />