The distribution and the behavior of vortices on a Bi2212 single crystal were observed by Bitter technique at a decoration temperature of 35-50K. For the sample cooled under a magnetic field, the movement of the vortex during the Ni decoration (5min.) was small, and a vortex lattice and a vortex chain were observed. The vortex lattice was observed when the sample was cooled under high magnetic field (_??_45G), while vortex chain was observed whenthe sample was cooled under low magnetic field (_??_35G). On the other hand, for the sample cooled under no magnetic field, the movement of the vortex during 5 min. was quite large, and striped pattem of Ni decoration was observed.