The home side opened the scoring just after 15 minutes when Rory McArdle managed to squeeze one past Swindon goalkeeper Wes Foderingham.
However, just after the hour-mark, Swindon found their equalizer through 20-year old Englishman Pritchard.
Cutting in from the right wing, Pritchard weaved his way through the City defenders and managed to release a left footed strike that flew into the bottom corner.
The draw keeps Swindon in the top half of the table on 34 points, well behind league leaders Brentford who currently sit on 49 points.
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball