The pressure effect on the Curie temperature (T(c)) and the forced mag
netostriction for MnGaGe are measured. The value of partial derivative
T(c)/partial derivative p is +1.72 K/kbar. The forced magnetostrictio
n at 4.2 K, partial derivative omega/partial derivative H (omega = DEL
TAV/V) is found to be +3.81 x 10(-9) Oe-1. The results are discussed u
sing a band theory.