The title compound, [PtBrH(C18H15P)2], has a square-planar environment around the Pt atom, with the hydride and bromide ligands being exactly collinear with Pt since they all lie on a crystallographic twofold rotation axis, and with mutually trans triphenylphosphine ligands with a P-Pt-P bond angle that is slightly bent towards the hydride [P-Pt-P = 170.81 (5)°]. The Pt-H distance (1.610 Å) is in good agreement with those found in structures determined by neutron diffraction. © 2007 International Union of Crystallography. All rights reserved.