A parameter sensitivity analysis is presented to examine the effect of different time dependent and time independent input parameters on the various output parameters of a tunnel-type directly irradiated solar agricultural dryer with integrated collector. The parameter sensitivity of the system is expressed by the sensitivity matrix, the elements of which are the relative sensitivity coefficients. The relative sensitivity coefficients have been calculated at different stages of the drying process. Results of the sensitivity analysis obtained for the drying of camomile are summarized in tabulated forms.