Simultaneously quantifying T2 and T2* properties can provide great sensitivity and specificity to diseases. However, most of the existing methods are time-consuming. Here, we develop an overlapping-echo method for simultaneously achieving reliable T2 and T2* maps in a single shot. This method is robust to motion and the inhomogeneity of B0. Experimental results demonstrate that the resulting T2 and T2* values are in good agreement with those obtained with reference methods.