Abstract: A golf backswing training device comprising a body. The body is formed having a unitary construction formed in a hollow oblate (flattened) hemispheroid shape, including a golf backswing training device body front panel, a golf backswing training device body rear panel and an arched segment extending therebetween. The golf backswing training device body front panel and rear panel are designed having like half elliptical shapes. The body is fabricated of a flexible, rigid material having a modulus of elasticity enabling the body to be compressed when a force is applied and returning to the original shape when the force is removed. The golf backswing training device is placed proximate a golfer's arm pit for use. The golfer would retain the body in position during a swing. This positions an arm of the golfer in a proper position during a backswing, thus creating proper muscle memory, thus improving the golfer's game.