  We report resistivity measurements of the helimagnet CrAs under pressures.
The helimagnetic transition with T_N ~ 265 K at ambient pressure is completely
suppressed above a critical pressure of P_c ~ 0.7 GPa, and superconductivity is
observed at ~2.2 K for zero resistance, which exists in a wide pressure range
extending beyond 3 GPa. Both the upper critical field H_{c2} and the
coefficient A in the resistivity increase toward P_c, suggesting that the
superconductivity of CrAs is mediated by electronic correlations enhanced in
the vicinity of the helimagnetic phase.
