The closure of Region-1 field-aligned current in MHD simulation P. Janhunen and H.E.J. Koskinen The closure path of Region-1 field-aligned current system in MHD simulations has an interesting shape. After leaving the ionosphere on the eveningside the current deviates from the field-aligned direction rather early and bends towards the Sun. After passing through the velocity shear region near the magnetopause, which is a generator region, it climbs up along the magnetopause, being more or less field-aligned. Because of this it again bends sunward. When approaching the noon-midnight meridian plane ($Y=0$ plane in GSM coordinates), however, the current becomes more and more field-perpendicular. It passes through the $Y=0$ plane at about $X=2\pm1, Z=11\pm1$. On the morningside the closure path is symmetric. This corresponds qualitatively to the traditional view of Region-1 current closure, but the closure path seems to reside more on the dayside than usually thought. We give a simple physical explanation for the dayside bending, which is based on the MHD pressure balance equation.