The present invention provides a fastening apparatus for retaining a connector coupled to an electronic device. The fastening apparatus for connector comprises a first fixing portion, a connection portion and a second fixing portion. The first fixing portion is disposed at one side of a connector and has a first binding unit. The connection portion is formed on the fixing portion to connect the first fixing portion to a housing of an electronic device. The second fixing portion is pivotally rotatable relative to the first fixing portion, the second fixing portion including a second binding unit which is engages with the first binding unit when the second fixing portion rotates to a particular location, so that a cable of the connector is enclosed between the first fixing portion and the second fixing portion.