A chain plate comprising: two end segments spaced apart from each other in a lengthwise direction, each of said end segments having a rod hole that has a central axis, one of said end segments further having an extension portion extending away from the central axis of said rod hole of said one of said end segments in the lengthwise direction, a first distance (a) from the central axis of said rod hole of said one of said end segments to an edge of said one of said end segments in the lengthwise direction being greater than a second distance (b) from the central axis of said rod hole of said one of said end segments to an edge of said one of said end segments in a widthwise direction; and an intermediate segment disposed between and connected to said end segments, wherein said chain plate has an inner surface and an outer surface that are opposite to each other in a thicknesswise direction, wherein said inner surface has a first inclined region corresponding to a peripheral region of said one of said end segments, and a second inclined region corresponding to said extension portion and between said first inclined region and said rod hole of said one of said end segments, and said first inclined region and said second inclined region are inclined toward said outer surface, wherein said intermediate segment is formed, at said inner surface, with a recess that is recessed in the thicknesswise direction toward said outer surface, said inner surface further has two third inclined regions that extend in the lengthwise direction and are inclined toward said outer surface, that are spaced apart from each other in the widthwise direction, and that are adjacent respectively to two sides of said recess, and said inner surface further has a planar region disposed between said third inclined regions, defining a bottom of said recess, said chain plate being characterised in that said recess has two parallel edges extending in the widthwise direction and spaced apart from each other in the lengthwise direction, and in that said recess has a width in the widthwise direction not greater than two thirds of a diameter of said rod hole. two end segments spaced apart from each other in a lengthwise direction, each of said end segments having a rod hole that has a central axis, one of said end segments further having an extension portion extending away from the central axis of said rod hole of said one of said end segments in the lengthwise direction, a first distance (a) from the central axis of said rod hole of said one of said end segments to an edge of said one of said end segments in the lengthwise direction being greater than a second distance (b) from the central axis of said rod hole of said one of said end segments to an edge of said one of said end segments in a widthwise direction; and an intermediate segment disposed between and connected to said end segments, wherein said chain plate has an inner surface and an outer surface that are opposite to each other in a thicknesswise direction, wherein said inner surface has a first inclined region corresponding to a peripheral region of said one of said end segments, and a second inclined region corresponding to said extension portion and between said first inclined region and said rod hole of said one of said end segments, and said first inclined region and said second inclined region are inclined toward said outer surface, wherein said intermediate segment is formed, at said inner surface, with a recess that is recessed in the thicknesswise direction toward said outer surface, said inner surface further has two third inclined regions that extend in the lengthwise direction and are inclined toward said outer surface, that are spaced apart from each other in the widthwise direction, and that are adjacent respectively to two sides of said recess, and said inner surface further has a planar region disposed between said third inclined regions, defining a bottom of said recess, said chain plate being characterised in that said recess has two parallel edges extending in the widthwise direction and spaced apart from each other in the lengthwise direction, and in that said recess has a width in the widthwise direction not greater than two thirds of a diameter of said rod hole.