Crossing of the magnetotail neutral sheet are examined with 20 a average magnetic field data from Imp 5 satellite. it is shown that for some multiple neutral sheet crossings, the By component reverses its sign between adjacent crossings. This feature can be explained in terms of a wavy profile of the neutral sheet along the dawn-dusk direction, but not in terms of flapping motion or wavy profile of the neutral sheet along the tailward direction. It is suggested that the magnetotail neutral sheet often shows departure from a plane geometry.