Is there such a thing as degree in pre-law?

No, there is no such thing as a "pre-law" degree. "Pre-law" is not a major or a degree program. Instead, it's a *path* students take to prepare for law school. Students typically pursue an undergraduate degree in any subject they're interested in, while taking courses that are helpful for law school (like political science, history, English, philosophy, economics). The undergraduate major itself is irrelevant to applying to law school; the LSAT score and GPA are much more important.