ACR B737 PIC INITIATES EVASIVE MANEUVER DUE TO OBSERVED GLIDER IN IMMEDIATE AREA. GLIDER SEES B737 AT CLOSE DISTANCE AND INITIATES EVASIVE MANEUVER INTO; NOT AWAY FROM DSNDING B737. FLT ATTENDANT INJURED. TFC ISSUED BY ATC.

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WX WAS CAVU DSNDING INTO PHX AREA. ALT WAS JUST BELOW 12000 FT WHEN PHX APCH CTL ADVISED OF 'TFC 12 O'CLOCK POS; ALT UNKNOWN.' FO WAS FLYING. WE LOOKED FOR THE TFC UP AND DOWN FOR AT LEAST 30 SECONDS WHEN I SPOTTED A GLIDER JUST ABOVE US TO OUR L AND HDG STRAIGHT AT US. I PUSHED THE AIRPLANE DOWN AND TO THE R. THE SEAT BELT SIGN HAD BEEN ON FOR SEVERAL MINS ALREADY. THE PURSER ADVISED THAT IN FIRST CLASS; THE MANEUVER WAS A 'ZERO G' EFFECT. THE EFFECT IN THE AFT CABIN WAS UNDOUBTEDLY MORE PRONOUNCED.THE GLIDER PLT FINALLY SAW OUR B737-300 AND BEGAN AN EVASIVE; PANIC MANEUVER DOWN AND TO THE R. MY DSNDING TURN TO THE R PLACED MY L WING UP SLIGHTLY. THE GLIDER'S DSNDING R WING PLACED HIS R WING DOWN. OUR WINGS PROBABLY CAME WITHIN 10-20 FT OF EACH OTHER. THE GLIDER EVIDENTLY DIDN'T HAVE A XPONDER. HIS EVASIVE MANEUVER WAS ACTUALLY IN THE DIRECTION OF OUR AIRLINER AND WAS A MISTAKE. IT WOULD PROBABLY HAVE BEEN BETTER IF THE PANIC MANEUVER WAS A PULL UP INSTEAD OF A PUSH DOWN. I PROBABLY WOULDN'T HAVE PUSHED FORWARD SO HARD IF HE'D PULLED UP. 1 FLT ATTENDANT IN THE REAR CABIN WAS INJURED AND WAS TAKEN TO A PHOENIX HOSPITAL AND RELEASED THE NEXT DAY. WE ASKED FOR; AND WERE MET BY; ARPT FIRE DEPT MEDICS. I NEVER SAW AN AMBULANCE.