A dual and omnidirectional mortar base plate to be used in mortar carrier vehicles comprising a bottom base plate coupled to a mortar and a top base plate; wherein the dual base plate is adapted to move along a movement path from a resting position, associated with a position for movement of the vehicle, towards a work position associated with a firing position for the mortar, and vice versa. Likewise the dual base plate has elements for fast stowage in the mortar carrier vehicle.The dual base plate consists of a bottom base plate, a top base plate, and connection and repositioning elements between the two to facilitate the transfer of the forces generated by said firing to the ground, isolating the mortar carrier vehicle from the forces generated by firing the mortar. Truncated cone shaped hoppers allow the bottom plate to move in any direction in which the mortar is fired.