41-year-old David Alexander Baxter of Amherst has been charged with using a knife while committing an offence, aggravated assault; and attempted murder against Todd Smith.
Police were called to a West Pleasant Street address late Thursday afternoon.
The 47-year-old victim was stabbed a number of times while a 35-year-old woman was also hurt.
Officers added that it was not a random act and that all parties were known to each other.