diff --git a/src/regexp/token.rs b/src/regexp/token.rs
--- a/src/regexp/token.rs
+++ b/src/regexp/token.rs
@@ -1,11 +1,12 @@
-use std::fmt;
+use std::{borrow::Borrow, fmt};
 
 #[derive(Debug, Clone)]
 pub enum ParsingError {
 	Asterisk {s: String, pos: usize},
 	Plus {s: String, pos: usize},
 	OpeningParenthesis {s: String, pos: usize},
-	ClosingParenthesis {s: String, pos: usize}
+	ClosingParenthesis {s: String, pos: usize},
+	EmptyAlternativeVariant
 }
 
 impl fmt::Display for ParsingError {
@@ -22,6 +23,9 @@ impl fmt::Display for ParsingError {
 			},
 			ParsingError::ClosingParenthesis {s, pos} => {
 				write!(f, "An closing parenthesis not found. Pattern \"{s}\", position {pos}")
+			},
+			ParsingError::EmptyAlternativeVariant => {
+				write!(f, "Found an empty Alternative variant.")
 			}
 		}
 	}
@@ -39,6 +43,10 @@ pub struct Plus {
 	content: Box<Token>
 }
 
+pub struct Alternative {
+	content: Vec<Box<Token>>
+}
+
 pub struct Chain {
 	content: Vec<Box<Token>>
 }
@@ -47,6 +55,8 @@ pub enum Token {
 	Symbol(Symbol),
 	Asterisk(Asterisk),
 	Plus(Plus),
+	Alternative(Alternative),
+	AlternativeSeparator,
 	Chain(Chain)
 }
 
@@ -108,6 +118,61 @@ impl Plus {
 	}
 }
 
+impl Alternative {
+	fn new(content: Vec<Box<Token>>) -> Result<Alternative, ParsingError> {
+		let mut variants: Vec<Vec<Box<Token>>> = vec![Vec::new()];
+
+		content.into_iter().for_each(|x| {
+			if matches!(x.borrow(), Token::AlternativeSeparator) {
+				variants.push(Vec::new());
+			} else {
+				variants.last_mut().unwrap().push(x);
+			}
+		});
+
+		if variants.iter().any(|x| x.is_empty()) {
+			return Err(ParsingError::EmptyAlternativeVariant);
+		}
+
+		return Ok(Alternative{
+			content: variants.into_iter().map(
+				|x| Box::new(Token::Chain(Chain{content: x}))
+			).collect()
+		});
+	}
+
+	fn is_skippable(&self) -> bool {
+			return self.content.iter().any(|x| x.is_skippable());
+	}
+
+	fn list_first(&self) -> Vec<usize> {
+		let mut res = Vec::new();
+		for token in self.content.iter() {
+			res.append(&mut token.list_first());
+		}
+
+		return res;
+	}
+
+	fn list_last(&self) -> Vec<usize> {
+		let mut res = Vec::new();
+		for token in self.content.iter() {
+			res.append(&mut token.list_last());
+		}
+
+		return res;
+	}
+
+	fn list_neighbours(&self) -> Vec<(usize, usize)> {
+		let mut res = Vec::new();
+		for token in self.content.iter() {
+			res.append(&mut token.list_neighbours());
+		}
+
+		return res;
+	}
+}
+
 impl Chain {
 	fn is_skippable(&self) -> bool {
 		return self.content.iter().all(|x| x.is_skippable());
@@ -163,6 +228,8 @@ impl Token {
 			Token::Symbol(_) => false,
 			Token::Asterisk(_) => true,
 			Token::Plus(_) => false,
+			Token::Alternative(t) => t.is_skippable(),
+			Token::AlternativeSeparator => panic!(),
 			Token::Chain(t) => t.is_skippable()
 		}
 	}
@@ -172,6 +239,8 @@ impl Token {
 			Token::Symbol(t) => t.list_first(),
 			Token::Asterisk(t) => t.list_first(),
 			Token::Plus(t) => t.list_first(),
+			Token::Alternative(t) => t.list_first(),
+			Token::AlternativeSeparator => panic!(),
 			Token::Chain(t) => t.list_first()
 		}
 	}
@@ -181,6 +250,8 @@ impl Token {
 			Token::Symbol(t) => t.list_last(),
 			Token::Asterisk(t) => t.list_last(),
 			Token::Plus(t) => t.list_last(),
+			Token::Alternative(t) => t.list_last(),
+			Token::AlternativeSeparator => panic!(),
 			Token::Chain(t) => t.list_last()
 		}
 	}
@@ -190,6 +261,8 @@ impl Token {
 			Token::Symbol(t) => t.list_neighbours(),
 			Token::Asterisk(t) => t.list_neighbours(),
 			Token::Plus(t) => t.list_neighbours(),
+			Token::Alternative(t) => t.list_neighbours(),
+			Token::AlternativeSeparator => panic!(),
 			Token::Chain(t) => t.list_neighbours()
 		}
 	}
@@ -211,6 +284,7 @@ fn find_closing_parenthesis(s: &String) 
 pub fn parse(pattern: &String, offset: usize) -> Result<Token, ParsingError> {
 	let chars: Vec<char> = pattern.chars().collect();
 	let mut res: Vec<Box<Token>> = Vec::new();
+	let mut is_alternative = false;
 	let mut i = 0;
 	while i < pattern.len() {
 		let c = chars[i];
@@ -234,6 +308,11 @@ pub fn parse(pattern: &String, offset: u
 			')' => {
 				return Err(ParsingError::OpeningParenthesis {s: pattern.clone(), pos: i});
 			}
+			'|' => {
+				is_alternative = true;
+				res.push(Box::new(Token::AlternativeSeparator));
+				i += 1;
+			}
 			_c => {
 				res.push(Box::new(Token::Symbol(Symbol{position: i+offset})));
 				i += 1;
@@ -241,7 +320,11 @@ pub fn parse(pattern: &String, offset: u
 		}
 	}
 
-	return Ok(Token::Chain(Chain{content: res}));
+	if is_alternative {
+		return Ok(Token::Alternative(Alternative::new(res)?));
+	} else {
+		return Ok(Token::Chain(Chain{content: res}));
+	}
 }
 
 mod test {