A dock for an electronic device is in capable of keeping conductive contacts within the dock until the electronic device is inserted into the dock. Furthermore, collision between an insertion portion of the electronic device and the conductive contacts can be avoided in the process of inserting the electronic device into the dock or removing the electronic device from the dock, so as to prevent the conductive contacts or the surface of the electronic device from being damaged. An electronic device assembly having the aforementioned dock is also provided.