Abstract: A conditioning device for an agricultural harvesting machine includes a first and a second roller that each are supported with respect to a housing to enable the rollers to rotate about respective longitudinal axes in order to delimit a gap through which crop passes. The housing is formed with a first and a second housing section such that the second housing section moves relative to the first housing section from a closed position in which the housing seals the rollers with respect to the surroundings into a closed position in which the rollers are accessible from outside the housing. The rollers are each supported with respect to the first housing section by way of a shaft extending between the first and the second housing sections.