Speaking to the media on Friday, Erik ten Hag said: "Marcus Rashford is really important, you have seen from the first day I'm here.
"I'm really happy with Marcus, I don't want to lose him. He's definitely in our plans here at Manchester United."
Rashford has been linked with a move to Paris Saint-Germain with the Ligue 1 giants reportedly holding talks with the 24-year-old's representatives.
The forward is seemingly ready to move to France this summer but Man United are adamant that the England international is not for sale at any price.
Rashford's contract at Old Trafford expires at the end of the 2022/23 season although the club retain an option of extending the deal for a further year.
Source: Manchester Evening News