A passively Q-switched eye-safe intracavity optical parametric oscillator,end-pumped by a pulsed laser diode array,is studied experimentally.The output energy and threshold of the pump wavelength and the signal wavelength with respect to the transmission of output mirror are analyzed at the same Cr4+∶YAG saturable absorber. The output energy of 8.5 mJ and the pulse widh of 2 ns at the eye-safe wavelength are obtained with the repetition rate of 20 Hz, giving the optical-optical conversion efficiency of about 6% from diode power at 808 nm to optical parametric oscillator (OPO) signal output.