"Is trigger" option doesn't works

I have attached the rigid body and box collider to a game object, wich have to fall on another game object with box collider, while play mode is enabled the collision system works well, the problem is that when I activate the Is trigger option in any of the game objects and then play mode, those dont collide, the first object just continues falling, why??

This is just the intended behavior of a trigger. They send “OnTrigger” messages to scripts, but they do not collide with other static or rigidbody colliders. Is there a reason you need either of the objects to be a trigger?

Because that’s what triggers do… they allow you to detect “collisions” (using OnTriggerEnter/Stay/Exit), while still allowing objects to pass through each other. If you want the falling object to stop on collision, disable “Is Trigger”.