Party membership is in decline in Israel. This article analyzes the main characteristics of party members in three of the largest parties in Israel: Kadima, Likud, and Labor. Party members in Israel share similar features with party members in other countries: they are older, economically better off than the average voter, they are more highly educated than an average voter, and they are more likely to be male than female. This comparison between the members population and the voters population also demonstrates that Arabs are over-represented in Kadima and Labor while religious people are over-represented in Kadima and especially Likud. Most party members claim that ideological motivations led them to join a particular party, yet they suspect that the other members are motivated by more instrumental reasons. They expect the party to act cohesively but at the same time clearly support deeper intraparty democratization. They are also rather passive, hardly engaging in party activities.