  We examined the piezomagnetic effect in an antiferromagnet composed of MnTe,
which is a candidate material for altermagnetism with a high critical
temperature. We observed that the magnetization develops with the application
of stress and revealed that the piezomagnetic coefficient Q is
1.38$\times10^{-8}$ ${\mu}$B/MPa at 300 K. The poling-field dependence of
magnetization indicates that the antiferromagnetic domain can be controlled
using the piezomagnetic effect. We demonstrate that the piezomagnetic effect is
suitable for detecting and controlling the broken time reversal symmetry in
altermagnets.
