A testing tray includes a receiving member and a connector. The receiving includes a tray and a latching member. The tray includes a bottom wall, a peripheral sidewall protruded from the bottom wall, a resisting member and a guide groove. The resisting member includes a resisting portion and two elastic portions coupling the resisting portion with the peripheral sidewall. The tray includes at least one latching portion protruded from the peripheral sidewall. The latching member includes a sliding portion slidably mounted on the bottom wall to cover the guide groove and an elastic member located between the sliding portion and the bottom wall. The connector includes a fixed member detachably mounted on the at least one latching portion and a conducting member detachably mounted on the fixed member. The conducting member is capable of coupling the electronic device with a testing device.