A testing device with enhanced accessibility for repair and replacement purposes includes a base, an upper seat, a test board and a needle seat. The upper seat is mounted on the base. The test board is sandwiched between the base and the upper seat. A receiving groove is defined on the upper seat. The receiving groove extends through the upper seat to partially expose the test board. The needle seat is detachably fixed to the upper seat. A lower part of the needle seat is received in the receiving groove and abuts against the test board. An upper portion of the needle seat protrudes from the upper seat and is configure for connecting connection terminals of a product to be tested.