  We consider parity nonconservation (PNC) in singly ionized ytterbium (Yb+)
arising from the neutral current weak interaction. We calculate the PNC
electric dipole transition amplitude (E1_PNC) and the properties associated
with it using the relativistic coupled-cluster theory. E1_PNC for the [4f^{14}]
^2 6s --> [4f^{14}] ^2 5d_{3/2} transition in Yb+ has been evaluated to within
an accuracy of 5%. The improvement of this result is possible. It therefore
appears that this ion is a promising candidate for testing the standard model
of particle physics.
