Abstract: A motionless mixing device for mixing fluidic materials such as liquid, gas, wet and dry powders, etc. employing a generally horizontal cylindrical housing with an inlet at one end and an outlet at the opposite end. A plurality of spaced-apart mixing elements are positioned in the housing to form a mixing device, each of mixing elements being inclined transversely of the longitudinal axis of the housing at a linear edge thereof in the direction of the flow of the fluidic materials flowing through the housing, one end of each said mixing element in the radial direction of the housing being fixedly disposed in the inner wall of the housing, a suitable space being formed between another end of each said mixing element and the adjacent inner wall thereof so that materials trapped by said element are permitted to pass therethrough.