The present invention discloses a golf swing trainer for improving a golfer's drive, posture, and technique when swing a golf club. The golf swing trainer includes a base, two lateral arms, and inside and outside guides which form a corridor through which a golf club is swung. Other elongated members are disclosed for securing a golfer's waste with a harness, bracing their leg, and the like. These components allow a golfer to simulate a golf swing and practice posture and technique preparatory to driving an actual golf ball.