Evidence is presented that (a) employees in an organization form global beliefs concerning the extent to which the organization values their contributions and cares about their well-being, (b) such perceived organizational support reduces absenteeism, and (c) the relation between perceived organizational support and absenteeism is greater for employees with a strong exchange ideology than those with a weak exchange ideology. These findings support the social exchange view that employees' commitment to the organization is strongly influenced by their perception of the organization's commitment to them. Perceived organizational support is assumed to increase the employee's affective attachment to the organization and his or her expectancy that greater effort toward meeting organizational goals will be rewarded. The extent to which these factors increase work effort would depend on the strength of the employee's exchange ideology favoring the trade of work effort for material and symbolic benefits.