Just a wild guess but to my eyes it looks like a juvenile Monstera deliciosa:
Split-Leaf Philodendron (Monstera deliciosa) They don't get the splits in their leaves until they begin to mature.
Scroll down this page and it will show juvenile leaves:
http://www.exoticrainforest.co...
Edited to say: Now that I look at your photo again I'm not sure ... definitely in the Aroid family (Philodendron's etc.) but I'm not sure which plant.
