Abstract: A soap dispenser includes a structure in which an inner shell and an outer shell are slidably engaged together. An enclosed space is formed after the inner shell and the outer shell are engaged so as to accommodate and hold a refillable bottle or a disposable bag. The inner shell and the outer shell are fixed and locked with each other by a spring and a metal pin, and provided with engaging grooves on the back thereof so as to enhance the connection strength, and allow to be opened only by using a magnetic key. The soap dispenser solves the problems of poor anti-theft and tamper-proof effect, serious plastic waste, contamination caused by repeated filling, difficult maintenance, unattractive appearance, poor user experience, which are of great significance in enhancing the efficiency of the use of cleaning products in public occasions and the user experience.