Science and Education Publishing Applied Mathematics and Physics 2 5 2014 10 23 Spherical Harmonic on a Four Sphere 157 160 EN Shabir Ahmad Akhoon Ashaq Hussain Sofi Department of Physics, National Institute of Technology, Srinagar, Kashmir, India Anil Maini Asloob Ahmad Rather AMP2014251 10.12691/amp-2-5-1 2014 10 04 2014 10 14 2014 10 23 In this paper, we will analyse the scalar harmonics on a four sphere using a associated Legendre function. Then, we will use these modes to construct two types of vector harmonics on a four sphere. Finally, we will also construct three types of tensor harmonics on a four sphere. As there is a relation between de Sitter spacetime and four sphere, these modes are related to the modes on de Sitter spacetime.