Tape cassette

A tape micro-cassette formed of molded plastic and having a pair of mating lower and upper cassette members and a pair of sidewalls at opposite ends thereof, and including a pair of tape reels rotatably mounted in said cassette with thin film magnetic tape extending between said reels and said tape wound on said reels such that it is payed out from one reel and taken up by the other reel on the sides of said reels adjacent said pair of sidewalls and said tape travels substantially parallel and in close proximity to said pair of sidewalls and said cassette having a portion available for recording and playback functions along a front wall of said cassette which has an open area, a pair of guide rollers for said tape mounted in the corners of said cassette between said front wall and said pair of sidewalls, respectively, a plurality of tape guides extending generally parallel to said front face of said cassette and providing guides for said tape at said front face and said inner walls of said pairs of sidewalls, said sidewalls being formed with roughened areas so that as the tape is payed out from one reel and taken up by the other reel it contacts the roughened areas of said inner pair of sidewalls, which prevents said thin film tape from adhering to said pair of sidewalls.