Impossible to tell from just a picture. Depends on whether the adapter includes a chip to actually convert dumb PS/2 signals to full USB signals, or if it just matches circuit to circuit. See here. And/or google for "will ps/2 to usb adapter work with any keyboard" and check all the various posts and such.

If you're buying this online, read the reviews and spec details before you buy it. If you've already got it, just try it and cross your fingers.