A windshield primer mixing device includes a housing having a bottom wall, a top wall and a peripheral wall extending between the top and bottom walls. A guide is mounted on the housing. A mounting is slidably positioned on the guide. A motor is adapted for selectively urging the mounting upwardly on the guide. A power supply is operationally coupled to the motor. A pair of coupling assemblies selectively couples a pair of containers to the mounting. The containers are removably coupled to the mounting and the mounting moved up and down until the contents of the containers are effectively mixed.