Joe Biden says he’s not surprised Kamala Harris lost the presidential election last year … putting the blame on sexist attitudes toward the former veep — while adding he’d have won.

The former president of the United States appeared on “The View” Thursday … and, he was asked if he was shocked when his vice president was defeated by Donald Trump in last year’s presidential race.

Joe says it doesn’t surprise him at all … pointing to sexism as a major reason Kamala lost despite how qualified she is.

Biden’s cognitive abilities became a major talking point last summer … and, ultimately, became the reason he had to step down as the Democratic nominee amid pressure from fellow Dems.

He also talked about allegations of cognitive decline in deeply sourced books now — all of which he vigorously denied on the show. Jill Biden — who appeared alongside her husband on “The View” — says these people who wrote the books weren’t in the White House with them, and don’t really know anything.