Yes but cook them first. visit this website for interesting information.
http://www.garden.org/ediblelandscaping/?page=july_elderberry

Try a few added to an apple pie, they turn the fruit a gorgeous shade of pink.

The seeds are quite big so you may like to sieve them after cooking. I have eaten them raw many a time but only few at once. Elderberry wine is a good thing to do with them.

Juice and flesh is edible.

The raw seeds are poisonous (cyanide producing glycosides) but are rendered harmless by prolonged cooking.

Lucky I'm stillhere then!

Don't worry, just like apple pips you have to eat quite lot to be ill!

Lol...

Thanks for that info.