The study outlined how the solar box cooker is constructed; taking in mind all those conditions tha t enhances optimum heat gains in the cooker and avoiding those that will bring heat lost into it. Some selected instruments were used in taking major measurements while the cooker is at work. The results found revealed that at about 1400 on the selected day the cooker receives maximum solar insolation. Some other parameters like temperature of the solar plates, the ambient temperature in the

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... erature in the cooker seem to be higher at that hour, more importantly, the experimental efficiency recorded higher value at that period, and the result of the experimental value of efficiency is in agreement with the theoretical value calculated.