A support pin for an image display apparatus that includes: a back frame (140, 140a) disposed on a rear-surface side of a display panel; a plurality of light-emitting diodes disposed on a front-surface side of the back frame (140, 140a); a luminance uniforming plate which is disposed on a front-surface side of the plurality of LEDs to cover the plurality of LEDs, and configured to make uniform luminance of light emitted by the plurality of LEDs; and a diffuser plate which is disposed on a front-surface side of the luminance uniforming plate, and configured to diffuse light transmitted through the luminance uniforming plate, the support pin comprising: a pedestal which is fixable to an opening portion formed in the back frame (140, 140a); and a support which extends from the pedestal toward the front-surface side of the display panel to penetrate in use through the luminance uniforming plate, and has a tip end that is configured to support the diffuser plate, wherein the pedestal includes a holding portion (211, 212) which is configured to hold in use, in a sandwiching manner, the back frame (140, 140a) in a thickness direction of the back frame (140, 140a), and the holding portion (211, 212) includes: a first portion which is contactable with a first main surface of the back frame and a second portion which faces the first portion, and contactable with a second main surface of the back frame opposed to the first main surface of the back frame, characterized in that at least one of a surface of the first portion and the second portion is stepped, such that the back frame (140, 140a) is disposable on the surface of the holding portion (211, 212), wherein a first step of the surface protrudes from a second step of the surface such that a space between the second step and the first portion different from a space between the first step and the first portion are formed in the holding portion in a thickness direction of the back frame. a pedestal which is fixable to an opening portion formed in the back frame (140, 140a); and a support which extends from the pedestal toward the front-surface side of the display panel to penetrate in use through the luminance uniforming plate, and has a tip end that is configured to support the diffuser plate, wherein the pedestal includes a holding portion (211, 212) which is configured to hold in use, in a sandwiching manner, the back frame (140, 140a) in a thickness direction of the back frame (140, 140a), and the holding portion (211, 212) includes: a first portion which is contactable with a first main surface of the back frame and a second portion which faces the first portion, and contactable with a second main surface of the back frame opposed to the first main surface of the back frame, characterized in that at least one of a surface of the first portion and the second portion is stepped, such that the back frame (140, 140a) is disposable on the surface of the holding portion (211, 212), wherein a first step of the surface protrudes from a second step of the surface such that a space between the second step and the first portion different from a space between the first step and the first portion are formed in the holding portion in a thickness direction of the back frame. a first portion which is contactable with a first main surface of the back frame and a second portion which faces the first portion, and contactable with a second main surface of the back frame opposed to the first main surface of the back frame, characterized in that at least one of a surface of the first portion and the second portion is stepped, such that the back frame (140, 140a) is disposable on the surface of the holding portion (211, 212), wherein a first step of the surface protrudes from a second step of the surface such that a space between the second step and the first portion different from a space between the first step and the first portion are formed in the holding portion in a thickness direction of the back frame.