  An interplay between non-Hermiticity and disorder plays an important role in
condensed matter physics. Here, we report the universal critical behaviors of
the Anderson transitions driven by non-Hermitian disorders for three
dimensional (3D) Anderson model and 3D U(1) model, which belong to 3D class
${\rm AI}^{\dagger}$ and 3D class A in the classification of non-Hermitian
systems, respectively. Based on level statistics and finite-size scaling
analysis, the critical exponent for length scale is estimated as $\nu=0.99\pm
0.05$ for class ${\rm AI}^{\dagger}$, and $\nu=1.09\pm 0.05 $ for class A, both
of which are clearly distinct from the critical exponents for 3D orthogonal and
3D unitary classes, respectively. In addition, spectral rigidity, level spacing
distribution, and level spacing ratio distribution are studied. These critical
behaviors strongly support that the non-Hermiticity changes the universality
classes of the Anderson transitions.
