HTML5 實體名稱（字母 - B）
並非下表中的所有實體都能在所有的流覽器中正確地顯示。
目前，IE 11 是唯一一個能正確顯示所有 HTML5 實體的流覽器。
| 字元 | 實體名稱 | 十六進制 |
|---|---|---|
| ≌ | backcong | 0224C |
| ϶ | backepsilon | 003F6 |
| ‵ | backprime | 02035 |
| ∽ | backsim | 0223D |
| ⋍ | backsimeq | 022CD |
| ∖ | Backslash | 02216 |
| ⫧ | Barv | 02AE7 |
| ⊽ | barvee | 022BD |
| ⌅ | barwedge | 02305 |
| ⎵ | bbrk | 023B5 |
| ⎶ | bbrktbrk | 023B6 |
| ≌ | bcong | 0224C |
| Б | Bcy | 00411 |
| б | bcy | 00431 |
| „ | bdquo | 0201E |
| ∵ | because | 02235 |
| ⦰ | bemptyv | 029B0 |
| ϶ | bepsi | 003F6 |
| ℬ | bernou | 0212C |
| ℬ | Bernoullis | 0212C |
| Β | Beta | 00392 |
| β | beta | 003B2 |
| ℶ | beth | 02136 |
| ≬ | between | 0226C |
| 𝔅 | Bfr | 1D505 |
| 𝔟 | bfr | 1D51F |
| ⋂ | bigcap | 022C2 |
| ◯ | bigcirc | 025EF |
| ⋃ | bigcup | 022C3 |
| ⨀ | bigodot | 02A00 |
| ⨁ | bigoplus | 02A01 |
| ⨂ | bigotimes | 02A02 |
| ⨆ | bigsqcup | 02A06 |
| ★ | bigstar | 02605 |
| ▽ | bigtriangledown | 025BD |
| △ | bigtriangleup | 025B3 |
| ⨄ | biguplus | 02A04 |
| ⋁ | bigvee | 022C1 |
| ⋀ | bigwedge | 022C0 |
| ⤍ | bkarow | 0290D |
| ⧫ | blacklozenge | 029EB |
| ▪ | blacksquare | 025AA |
| ▴ | blacktriangle | 025B4 |
| ▾ | blacktriangledown | 025BE |
| ◂ | blacktriangleleft | 025C2 |
| ▸ | blacktriangleright | 025B8 |
| ␣ | blank | 02423 |
| ▒ | blk12 | 02592 |
| ░ | blk14 | 02591 |
| ▓ | blk34 | 02593 |
| █ | block | 02588 |
| =⃥ | bne | 0003D 020E5 |
| ≡⃥ | bnequiv | 02261 020E5 |
| ⫭ | bNot | 02AED |
| ⌐ | bnot | 02310 |
| 𝔹 | Bopf | 1D539 |
| 𝕓 | bopf | 1D553 |
| ⊥ | bot | 022A5 |
| ⊥ | bottom | 022A5 |
| ⋈ | bowtie | 022C8 |
| ⧉ | boxbox | 029C9 |
| ╗ | boxDL | 02557 |
| ╖ | boxDl | 02556 |
| ╕ | boxdL | 02555 |
| ┐ | boxdl | 02510 |
| ╔ | boxDR | 02554 |
| ╓ | boxDr | 02553 |
| ╒ | boxdR | 02552 |
| ┌ | boxdr | 0250C |
| ═ | boxH | 02550 |
| ─ | boxh | 02500 |
| ╦ | boxHD | 02566 |
| ╤ | boxHd | 02564 |
| ╥ | boxhD | 02565 |
| ┬ | boxhd | 0252C |
| ╩ | boxHU | 02569 |
| ╧ | boxHu | 02567 |
| ╨ | boxhU | 02568 |
| ┴ | boxhu | 02534 |
| ⊟ | boxminus | 0229F |
| ⊞ | boxplus | 0229E |
| ⊠ | boxtimes | 022A0 |
| ╝ | boxUL | 0255D |
| ╜ | boxUl | 0255C |
| ╛ | boxuL | 0255B |
| ┘ | boxul | 02518 |
| ╚ | boxUR | 0255A |
| ╙ | boxUr | 02559 |
| ╘ | boxuR | 02558 |
| └ | boxur | 02514 |
| ║ | boxV | 02551 |
| │ | boxv | 02502 |
| ╬ | boxVH | 0256C |
| ╫ | boxVh | 0256B |
| ╪ | boxvH | 0256A |
| ┼ | boxvh | 0253C |
| ╣ | boxVL | 02563 |
| ╢ | boxVl | 02562 |
| ╡ | boxvL | 02561 |
| ┤ | boxvl | 02524 |
| ╠ | boxVR | 02560 |
| ╟ | boxVr | 0255F |
| ╞ | boxvR | 0255E |
| ├ | boxvr | 0251C |
| ‵ | bprime | 02035 |
| ˘ | Breve | 002D8 |
| ˘ | breve | 002D8 |
| ¦ | brvbar | 000A6 |
| ℬ | Bscr | 0212C |
| 𝒷 | bscr | 1D4B7 |
| ⁏ | bsemi | 0204F |
| ∽ | bsim | 0223D |
| ⋍ | bsime | 022CD |
| \ | bsol | 0005C |
| ⧅ | bsolb | 029C5 |
| ⟈ | bsolhsub | 027C8 |
| • | bull | 02022 |
| • | bullet | 02022 |
| ≎ | bump | 0224E |
| ⪮ | bumpE | 02AAE |
| ≏ | bumpe | 0224F |
| ≎ | Bumpeq | 0224E |
| ≏ | bumpeq | 0224F |