The study of committee assignment politics is very limited in parliamentary systems. Even more limited is the study of the change in committee assignments that occurs between elections. In this article, a first attempt to rectify this, both theoretically and empirically, is presented. What might have an impact on committee reassignments and what relationship one would expect to find are discussed. Using data of all Danish committee assignments 1994–2007, the proposed relationships are tested. The results show that: (1) it varies which parties experience the more change; and (2) it is often related to internal problems, but vote share, seniority and whether an MP is involved in a ministerial reshuffle or not also have a significant influence on change of committee assignments.