We studied the dynamics of photo-detrapped solvated electrons in the ionic liquid trimethyl-N-propylammonium bis(trifluoromethanesulfonyl)imide (TMPA-TFSI) using laser flash photolysis. The solvated electrons were produced by the electron photodetachment from iodide via a 248nm KrF excimer laser. The solvated electron decayed by first-order kinetics with a lifetime of about 240ns. The spectrum of the solvated electron in the ionic liquid TMPA-TFSI is very broad with a peak around 1100nm. After the 248nm pulse, a 532nm pulse was used to subsequently detrap the solvated electrons. After the detrapping pulse, quasi-permanent bleaching was observed. The relative magnitude of the bleaching in the solvated electron absorbance was measured from 500 to 1000nm. The amount of bleaching depends on the probe wavelength. The fraction of bleached absorbance was larger at 500nm than that at 1000nm, suggesting that there are at least two species that absorb 532nm light. We discuss the present results from viewpoint of the heterogeneity of ionic liquids.