Hartlepool Borough Council agreed before Christmas to axe nine patrols across town to save £32,000 as part of a wider £2.6m series of cuts.
Now the Ad Astra Academy Trust has revealed that three of its Hartlepool primary schools – Barnard Grove, Brougham and West View – are among those affected.
Trust chair Chris Simmons is also writing to the council to urge it to reverse its decision and to suggest where savings can instead be made.
Mr Simmons said: “I am shocked and very disappointed that the council has seen fit to remove school crossing patrols from outside several Hartlepool primary schools.
“The council saving is miniscule in comparison to its multi-million-pound annual budget.
"You cannot put a price on a child’s life, and we are urging the council to reconsider this decision.
“The council has effectively decided to put the safety of young children below other council spending priorities and this cannot be right.
“The safety – particularly of children - is paramount.
"As a result, we will be writing to the council urging them to protect this service and fund it from its cultural events and leisure budget which extends to hundreds of thousands of pounds every year.”
The trust says many parents of children at its affected schools have already voiced their concerns.
Mr Simmons added: “The fact that this decision was apparently mooted and made behind closed doors, in my opinion, demonstrates the questionable nature of the decision.
“I sincerely hope that this appalling decision will be revisited and rescinded as soon as possible so that parents can have the reassurance that their children will be supervised and safely escorted across the road before and after school by properly trained council staff.”
Conservative councillor Cameron Stokell, the council’s deputy leader, earlier this week said the scale of required budget savings meant “many of those savings proposals were never going to be easy decisions”.