There have been Israeli Arab members of the Knesset ever since the first Knesset elections in 1949. The following is a list of the 76 past and present members. Some Israeli Druze dispute the label "Arab" and consider Druze to be a separate ethnic group. However, as they speak Arabic as their first language they are still included in this list.
References
List of Arab members of the Knesset Wikipedia(Text) CC BY-SA