Abstarct: Hassan-Robat granitoidic pluton outcropped located in the 38 Km west of Meymeh from Shahinshahr city of Isfahan province. Lithological composition of this pluton is granite and alkali-feldspar granite. Quartz and orthose are the most abundant of the felsic minerals. Biotite and hornblende are typical mafic silicate essential minerals. Biotite is presented throughout of this pluton but green hornblende has less frequency. Allanite, esphene and magnetite are typical accessory minerals. Allanite has special association with biotite. Basde on the grain size, this pluton divided in two parts: coarse grain and fine grain. Hassan-Robat granitoidic pluton intruded with notably mafic dykes in the it,s eastern parts. Mafic dykes are also presente in the south of the pluton in host rocks. Mentioned pluton intruded in dolomitic marble and marble. This pluton intruded in mextamorphic rocks of Sanandaj-Sirjan zone (SSZ) include of CarboniferousPermian marble and dolomitic marble. In sixty four stations oriented samples have been took from this pluton. baxsed on the carried out measurements, Average magnetic susceptibility of rock samples are 3542 μSI. Variation of magnetic susceptibilities has a best correlation with magnetite distribution. baxsed on the Km values, this pluton is belonging to ferromagnetic granites. Magnetic anisotropy (P) values (in term of percent) varies from 1 to 17.2. Shape parameter varies from -0.78 to 0.87. Magnetic ellipsoids are oblate and prolate, but prolate ellipsoid have more frequency. Magnetic lineations are aligned to west and the magnetic lineation mean has 250/50 (trend/plunge). Magnetic foliations mostly have dip to east and also have low dip. With attention to the lithological composition and their grain size (fine and coarse grain) and also cutting of coarse grain by fine grain granites, this pluton divided in A and B domains but magnetic lineation and foliation have the same behavior. Corresponding to cutting coarse grain granites by fine grain granites it look like that these two domains are emplaced in two stages but under the nearly same structural conditions. With attention to orientation pattern of magnetic lineations, their plunge values and considering the lithological constructions, it is possible probably magma forming of Hassan-Robat granitoidic pluton has been ascented to the up and then spread in west -southwest direction.