People argue on this question through the years, and the way na hindi nila masagot-sagot ay ginawa nalang itong katatawanan. People cannot answer this question because they rely on “Creation”, and it is not stated in the Holy Books what God created first. But when you rely on "Evolution", you can see the answer of this simple but tricky question.
Were talking about evolution. So don’t close your mind just because you don’t want to accept that we humans came from the family tree of apes. Were not talking about that. So here’s the deal, through years of studies it is found out that chickens came from the famous dinosaur T. rex. As the T. rexes reproduce and evolve into bird-like creatures and eventually chickens, through time, the transition of a T. rex-like parent that lays her chicken-like containing eggs gives us the idea that it is the egg that came first before chicken. That’s it, no arguments, no jokes, no bible-based evidences — just logical analysis of this situation with the use of the theory of evolution.