Floor crossing means to resign from one party and to join another party. In broader sense, the term “floor crossing” refers to voting against one’s own party in the House or parliament during the time of voting. Not only that floor crossing also says that if one member is not present at the time of voting or passing a bill or doesn’t take part in the voting the member will lose his membership or seat from the parliament. This term “floor crossing” can also be called “political defection” or “side swapping”.

According to Article 70 of Bangladesh constitution, a member of parliament has no power to vote against his party.If he or she vote against his or her party,he or she will lose his or her seat in the Parliament. This Article is also known as anti-defection law.