There are several Chalisa(s) which are dedicated to Lord Ganapati. We have given one of the popular Chalisa of Lord Ganesha- जय जय जय गणपति गणराजू
The word Chalisa (चालीसा) means a devotional hymn of 40 verses.
All Hindu deities represent cosmic energies that are part of the Divine Universal Energy or the Supreme God-head. In this regard, Ganesh represents the energy that is capable of removing obstacles and obstructions.
Due to this, he is revered and paid obeisance before starting any auspicious or important work. His blessings are sought before starting travel to ensure safe, smooth journey and successful completion of work.
It is believed that this prayer has such immense powers that anyone who chants it with full honesty and true devotion can obtain Lord Ganesh’s grace and achieve all their heart-felt desires.
The full Shri Ganesh Chalisa prayer which includes introductory and ending stanzas is provided here in Devanagari script...
Note: You are also able to download this document, so you can easily refer to it during your prayers...visit my slide-share profile and there you can download this eBook, so you can conveniently read it anytime, anywhere.