A latching mechanism for a portable electronic device includes a housing, a cover, a button, a latching member and at least one elastic member. The housing defines a latching hole. The cover defines a guide slot along a first direction. The button is assembled in the cover and movable along the guide slot. The latching member is secured with the button in a first direction and movable along a second direction, perpendicular with the first direction. The at least one elastic member is assembled between the button and the latching member. The latching member latches into the latching hole to secure the cover with the housing in the first direction. The button is pushed and slides along the guide slot. The latching member slides out the latching hole to unlatch the cover in the first direction.