In this paper, a control scheme for stochastic predefined-time stabilization of continuous-time stochastic Itô systems is proposed. Compared with stochastic finite-time or fixed-time stabilization, the proposed control scheme for stochastic predefined-time stabilization allows the upper bound of the mean value of the settling-time function to lie below an arbitrarily given positive value. Some Lyapunov-type results for predefined-time stabilization of general stochastic Itô systems are presented. Moreover, a state feedback control scheme is designed for a class of stochastic nonlinear systems in strict-feedback form. Two simulation examples are provided to show the usefulness of the proposed stochastic predefined-time stabilization.