This article examines the relationship between job and elder caregiving involvement, bi-directional work-caregiving conflict (work interfering with caregiving [WIC] and caregiving interfering with work [CIW]), and work costs (job interruptions and job changes). Specifically, we consider the effects of both behavioral and psychological involvement and external and internal work caregiving conflict in a sample of 583 women between the ages of 50 and 64 who work full-time and have significant elder caregiving responsibilities. A telephone survey was administered using random-digit-dial procedures. Structural equation model analyses confirmed that behavioral job involvement was associated with external CIW, psychological job involvement was associated with internal WIC and internal CIW, behavioral caregiving involvement was associated with external CIW and work costs, and psychological caregiving involvement was associated with internal CIW. Internal WIC, external CIW, and internal CIW were associated with job costs. Some mediation, particularly through external and internal CIW, occurred.