Jal Binayak (Nepali: जलविनायक) is a Hindu Temple of Lord Ganesh located in the Chobhar, central part of Kathmandu District, Nepal.

The Jal Binayak temple is the most important Ganesh shrine of the central region Kathmandu.

The present structure of the temple was reconstructed in Pagoda Style in 871 NS by King Rajya Prakash Malla of Kathmandu.

[2] Jal Binayak is one of the four original Ganesh of Kathmandu valley.

Additionally, there are other Ganesh temples like Kamal Binayak and Karya Binayak which are also popular Ganesh temples situated inside the valley.