Do false memories last? And do they last as long as true ones? This study investigated whether experimentally created false memories would persist for an extended period (one and a half years). A large number of subjects ( N  = 342) participated in a standard three‐stage misinformation procedure (saw the event slides, read the narrations with misinformation , and then took the memory tests). The initial tests showed that misinformation led to a significant amount of false memory . One and a half years later, the participants were tested again. About half of the misinformation false memory persisted, which was the same rate as for true memory . These results strongly suggest that brief exposure to misinformation can lead to long‐term false memory and that the strength of memory trace was similar for true and false memories .