The move paves the way for the announcement - expected imminently - that George Stephanopoulos (stehf-uh-NAHP'-uh-luhs) will join the morning show.
Cuomo has been the newsreader on "Good Morning America." His last day will be Friday, the same day as co-host Diane Sawyer, who is replacing the retiring Charles Gibson on "World News."
Cuomo had been considered the main competition to Stephanopoulos for Sawyer's old job. His move to the evening will pair him with co-host Elizabeth Vargas.