A spherical connector includes an upper spherical seat 1, a bolt 2 connected with a part, a lower spherical seat 3, a bolt 4 connected with another part, a spherical seat connection board 5, a spherical seat connection bolt 6 and a spherical seat locating pin 7. The invention is characterized in that the motion of one part is transferred to another part by the spherical connector; the motion error between the two parts is automatically removed by the spherical connector; thereby ensuring the transferring accuracy of a linear motion. The spherical connector of the invention has the advantages of being capable of automatically removing the motion error between the two connected parts.