Is their such thing as a rapture?

Not using that word "Rapture". It's not found in the Bible. Instead rapture describes the catching away from 1Th_4:17 Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.

When most people talking about the rapture of the church they are talking about the theory that the Church (Christians) disappear before the world enters a time of terrible stress and disasters called the Great Tribulation.

However, the timing may be in question as nowhere in the Bible does it say Christians will not go through the Tribulation. In fact, many statements by Jesus, Himself, point to the fact Believers may be here for much of the Tribulation, only disappearing when the rapture occurs at the "last trump", before the Wrath of God is pour out.