hi Fernando,
you may call it a pike a lance or a spear.
Lance is a catchall term for a variety of different pole weapons based on the spear. The name is derived from lancea, Roman auxiliaries' javelin, the word may be of Iberian origin. Also compare longche, a Greek term for lance.
A lance in the original sense is a light throwing spear, or javelin. The English verb to launch "fling, hurl, throw" is derived from the term (via Old French lancier), as well as the rarer or poetic to lance. The term from the 17th century came to refer specifically to spears not thrown, used for thrusting by heavy cavalry, and especially in jousting. A thrusting spear which is used by infantry is usually referred to as a pike.
Best,
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