flowコンテンツ - soyjoynice @ ウィキ

a　abbr　address　area (if it is a descendant of a map element)
article　aside　audio　b　bdi　bdo　blockquote　br　button
canvas　cite　code　command　datalist　del　details　dfn
div　dl　em　embed　fieldset　figure　footer　form　
h1　h2　h3　h4　h5　h6　hgroup
header　hr　i　iframe　img　input　ins　kbd　keygen
label　map　mark　math　menu　meter　nav　noscript
object　ol　output　p　pre　progress　q　ruby
s　samp　script　section　select　small　span　strong
style (if the scoped attribute is present)
sub　sup　svg　table　textarea　time　u　ul　var　video　wbr　text

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参考：
http://www.w3.org/TR/html5/content-models.html#flow-content