Authors report the design, fabrication and validation of a new micro-scale cell stimulator capable of providing simultaneous mechanical, electrical, and biochemical stimulation required for stem cell differentiation studies. The micro-bioreactor was designed to concurrently (i) perform mechanical stretching on a cell culture substrate, (ii) apply a uniform electric field in the cell culture region, and (iii) enable the straightforward delivery of biochemical stimulation. To test the capacity of the system in controlling key variables for efficient and reproducible electromechanical stimulation, Lonza’s human bone marrow mesenchymal stem cells (hMSCs) were used, which can be differentiated into various types of tissue cells, such as bone, adipose, cartilage, and muscle.